Tag Archives: stainless steel jewelry

Stainless steel jewelry with Rhodium plating

Rhodium plating is all about silver jewelry, right?
Wrong!
You can have Stainless steel jewelry with Rhodium plating.

Many people picture a bright, expensive Rhodium finish jewelry only as silver jewelry. It must be expensive to reach this look as you must use silver to craft the jewelry before you can apply rhodium plating.
Well, maybe not.

Yes, rhodium is still needed. Like anything in life, you get out of your jewelry what you put in. However, you don’t have to use expensive silver in order to get this sparkling luxury jewelry look.

You can upgrade your stainless steel jewelry with Rhodium plating. The color will be bright (whiter than steel), it will look expensive and it is easy to fit into your production schedule. You can plate chains, rings pendents, basically any type of steel jewelry.

Let’s find out what Stainless steel jewelry with Rhodium plating is all about.

The process of applying rhodium plating on steel jewelry is little different from applying Rhodium on silver jewelry.
The process involve 3 steps that can perform in different quality level (we outline our recommended spec below)  but one thing you must consider. The plating process does not cover any imperfection. Your steel jewelry must be clean, perfectly polished without marks before the plating.
Production steps for Stainless steel jewelry with Rhodium plating.

  1. Gold plating
  2. PDP / PCP /PNP plating
  3. Rhodium plating

How we plate steel jewelry with rhodium?

After polishing, assembly and quality check each piece of jewelry clean and prepare for plating.
In the first stage the steel jewelry socked in liquid solutions and plated with 24K gold. The gold layer use as a “glue” between the other 2 layers and the stainless steel. You must make sure the plating is dense enough and cover the whole item in order to insure high durability finished jewelry.
After the jewel is plated with 24K gold cleaned and dry it’s time for the 2nd layer. This layer can use different metals combination according to your budget and desired quality.

  1. PDP: Pure Palladium plating.
  2. PCP: Palladium and Cobalt mix plating.
  3. PNP: Palladium and Nickel mix plating.

Next, for the 3rd layer we will apply and plate the entire surface with pure Rhodium. It is possible to apply different thicknesses of rhodium according to the spec. The quality of this layer will have an impact on the color and the shines of your final jewelry piece.

How we test Stainless steel jewelry with Rhodium plating?

The method is very similar to testing other steel jewelry plating techniques like PVD. The testing performed by a fully automated X-ray machine (imported from Germany).
Because the thickness of each layer is very thin, we will perform 10 testing attempt to get the most accurate results. hard copy result’s report available to our customers.

Recommended specs for Stainless steel jewelry with Rhodium plating.

  1. 24K gold plating for 8-10 minutes. (until the jewelry piece is fully plated)
  2. Mix of 10% Cobalt and 90% Palladium for 2nd layer plating.
  3. 0.1 micron Pure Rhodium plating 3rd layer

When you are planning your next steel jewelry production, remember that your plating specs affects the cost and durability of the jewelry and adjust accordingly.

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Stainless steel necklace with rhodium plating, Hulpf jewelry China

Steel Jewelry PVD plating (Physical vapor deposition)

Today, for  stainless steel jewelry there is no reason to limit the color choice to the natural steel color. for steel jewelry PVD  plating is my option of choice.
If you follow the steel jewelry industry for few years, you have had heard the terms coating, plating  PVD, IP, IPG and “electroplating” many times.

Understanding the plating or coating methods and choosing the right one  can  be the difference between a failed to successful product.  In addition to a big different in price and quality.

My aim in the following posts is to describe the main methods used in the steel jewelry industry using as less as possible technical terms.
I hope the information will serve you during your purchasing process in China.

For those who don’t have time and need quick answers.

  • What is PVD?
    PVD is 2 thin layers applied to the surface.
  • What the different from IP to IPG to PVD?
    In general no differences other than the applying method.
  • Why not to use electroplating?
    The colors are not stable and it’s not durable as PVD plating.
  • Is there a price different?
    Yes, PVD plating way more expensive.
  • How durable is PVD plating?
    in normal use, the plating won’t change for few years if done correctly.
  • How to test PVD plating?
    With X-ray machine for the thickness and ISO sweat test for the durability.
  • what is the differences between glossy and satin PVD finishes?
    There are no differences, the surface finish is according to the jewel polish.

The 4  coating and plating techniques  mainly used in the jewelry industry.

  1. PVD (Physical vapor deposition) also refer by china suppliers as IP or IPG.
  2. Chemical also known as electroplating.
  3. Dip-coating, mainly use for silver and gold.
  4. Spraying.

PVD plating (Physical vapor deposition) .

Vacuum deposition is a family of processes used to deposit layers atom by atom in vacuum chamber on a solid surface. The layers may be as thin as one atom to millimeters thick. There may be multiple layers of different materials. A thickness of 0.25 to 0.7micron is generally called a thin film and very common in the jewelry and watch industries. The majority of steel jewelry use 0.20 to 0.28 micron plating. It is very rear to find steel jewelry with 0.7micron plating (some top brands use 0.35-0.5 micron) as the changed in price is not proportional to the thickness different.

The 5 Main PVD plating (vacuum deposition) methods

  1. Cathodic Arc Deposition.
  2. Electron beam physical vapor deposition.
  3. Evaporation deposition (mainly used for jewelry and watches).
  4. Pulsed laser deposition Sputter deposition

8 most popular PVD plating colors for stainless steel jewelry.

  1. Gold, 14K, 18K, 24K color variations.
  2. Rose gold (pink gold)
  3. Coffee.
  4. Black.
  5. Dark grey.
  6. Blue.
  7. Silver
  8. Platinum.

All these colors are available in a polished, satin or brush finish according to the product surface polish.

PVD Evaporation deposition in simple terms.

The jewelry or parts to be coated are first cleaned. Then, a first layer of Tin (tn) is vaporized in a vacuum chamber and use as a “base”.
For gold and rose gold finish real gold (14K or 18K) is evaporated and deposited on the part under high temperatures or via ion bombardment as a 2nd layer. The shade of the gold is according to the gold content.
Color pigments or gas in other cases together with the Tin layer are used to achieve other colors during the first layer process (without the use of gold as 2nd layer).
Depending on the substrate material the process temperature can be controlled from 100 degree Celsius to 280 degree Celsius.

Durability
Depend on the plating thickness, the manufacturing method and the reaction with the body acid. PVD will last from 10 months to few years. It’s a good place to mention that Rose gold color slightly change its color to yellow gold during the time the same as real rose gold or white gold jewelry (the copper in the rose gold oxidized) .
PVD plating on jewelry is not a scratch proof or lifetime finish although it is last longer than other plating in similar thickness (Zirconium Nitride (ZrN) is used for application required hard finish)
Igh quality PVD are more durable than other plating methods.
Price
The PVD price is relatively more expensive compare to other plating methods like Chemical, electroplating, or spraying but still lower than precious metal dip coating thanks to the thin film layer used.

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Stainless steel jewelry production, wire-cut EDM

Are you curios to know how we cut steel pendents in stainless steel jewelry production?

Is there any alternative ? what are the advantages using wire cut in Stainless steel jewelry production?

How it effect the price and delivery time?

Read about one of the most used fabrication methods in stainless steel jewelry production.

The wire-cut EDM is electrical discharge machine that uses CNC controller and continuous-traveling vertical wire under tension as one of the electrode to produce the desired shape.

The wire in wire-cut EDM is about as thick as a small diameter needle which allows creating a very delicate parts or shapes. In the stainless steel jewelry industry this fabrication method mostly used to cut flat parts out of steel sheets i.e. dog tag pendants.

Wire cut in stainless steel jewelry production considered to be a slow fabrication methods.  As the industry advanced and if the thickens of the steel jewelry product we produce allowed. We prefer to use laser or plasma cutting. Which speed the process.

Another disadvantage of wire cut is the finish of the part edges. in most cases it will require longer and costly polish process.

Wire-cut EDM  Machining According to Wikipedia.org:

“In wire electrical discharge machining (WEDM), also known as wire-cut EDM and wire cutting, a thin single-strand metal wire, usually brass, is fed through the workpiece. The wire, which is constantly fed from a spool, is held between upper and lower guides. The guides move in the X-Y plane, and sometimes the upper guide can also move independently giving rise to transitioning shapes (circle on the bottom square at the top). This gives the Wire-cut EDM  the ability to be programmed to cut very intricate and delicate shapes. The wire-cut uses water as its dielectric with the water’s resistivity and other electrical properties carefully controlled by filters and de-ionizer units…”  [View Wikipedia Entry]

Wire-cut EDM Machining Process

Wire-cut EDM  machining also known as Electrical Discharge Machining is an electro thermal production process in which a thin single-strand metal wire in conjunction with de-ionized water (used to conduct electricity) allows the wire to cut through metal by the use of heat from electrical sparks.

Due to the inherent properties of the process, Wire-cut EDM  can easily cut complex parts and precision components out of hard conductive materials.

How Wire-cut EDM Works with stainless steel jewelry

Wire-cut EDM  machining also known as spark EDM  works by creating an electrical discharge between the wire or electrode, & the work piece. As the spark jumps across the gap, material is removed from both the work piece & the electrode.

wire-cut-steel-jewelry-pendant

steel pendant in wire cut machine

 

To stop the sparking process from shorting out, a non conductive fluid or dielectric is also applied. The waste material is removed by the dielectric, and the process continues.

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Hulpf team

 

Toxic substances in stainless steel jewelry

Toxic substances in stainless steel jewelry , international standards.

  1. Definition
  2. Limits
  3. Test methods
  4. Test report example

I’ve seen a lot of arguments back and forth on the issue of toxic substances in stainless steel and fashion jewelry,  and one thing that really jumps out at me is how much confusion and misunderstanding there is regarding what the standards related to jewelry really mean. This is an attempt to clear up some of the confusion including simple instruction and up to date jewelry lab report examples.

High metal contamination in low-cost jewelry is a widespread problem. While the U.S. and Canadian legislation put emphasis on lead exposure prevention, other toxic elements like cadmium in jewelry are not regulated except in paint and coatings. After much discussion and consultation the European Commission has completed amendments to Annex XVII of Regulation1907/2006 (REACH), and published an Updated as on February 2016.

What regulations do we follow?

We at Hulpf jewelry follow the European Regulation and the REACH Annex XVII in specific as the EU legislation  regarding Toxic substances in stainless steel jewelry is more comprehensive and updated.

What substances related to steel jewelry we test for?

  1. Lead (Pb) content. Read more
  2. Cadmium (Cd) content. Read more
  3. Nickel (Ni) release. Read more…
  4. AZO dyes. Read more…

Where do we test  for Toxic substances in stainless steel jewelry ?

There are numerous independent internationally recognized labs and organization. We use SGS to test for toxic substances in stainless steel jewelry that we manufacture.

What the regulations mean to me as a customer?

Lead and its compounds in jewelry.

Section 63, Annex XVII of REACH will restrict the concentration of lead to 0.05% by weight. This will apply to any individual part of stainless steel jewelry articles, imitation jewelry, fashion jewelry, and hair accessories, including bracelets, necklaces and rings; piercing jewelry, wristwatches and wrist-wear; brooches and cufflinks.

63. 7439-92-1 231-100-4 Lead and its compounds

Shall not be placed on the market or used in any individual part of jewelry articles if the concentration of lead (expressed as metal) in such a part is equal to or greater than 0.05 % by weight.

(i) “jewellery articles” shall include jewellery and imitation jewellery articles and hair accessories, including:
(a) Bracelets, necklaces and rings;
(b) Piercingjewellery;
(c) Wrist watches and wrist-wear;
(d) Brooches and cufflinks;
(ii) “Any individual part” shall include the materials from which the jewellery is made, as well as the individual components of the jewellery articles.

Cadmium and its compounds in jewelry

Section 23, Annex XVII of REACH will restrict the concentration of Cadmium to 0.01% by weight.
This will apply to any individual components and assembled stainless steel and fashion jewelry articles.

23. 7440-43-9 231-152-8 Cadmium and its compounds.
Shall not be used or placed on the market if the concentration is equal to or greater than 0, 01 % by weight of the metal in:
(i) Metal beads and other metal components for jewellery making;
(ii) Metal parts of jewellery and imitation jewellery articles and hair accessories, including: bracelets, necklaces and rings, piercing jewellery, wrist-watches and wrist-wear, brooches and cufflinks.

Nickel release in jewelry.

Nickel and its compounds may pierce the skin and cause allergic contact dermatitis. The EU Directive 2004/96/EC was issued on 27 September 2004 to restrict the use of nickel in consumer products that may have contact with skin such as buttons, fashion jewelry, sunglasses and belt buckles. After REACH took into force, the directive was replaced by the Regulation (EC) No. 1907/2006 (REACH). Nickel release was then added to the REACH Annex XVII – REACH Restriction List.

The Requirements of REACH Restriction are for the release of the nickel in a given time and not the absolute content. There are 2 main jewelry categories.

  1. Articles that intend to pierce the human body for example ear studs and should release less than 0.2 µg/cm 2/week.
  2. Articles that intend to come into direct contact with the human skin should release less than 0.5 µg/cm 2/week.

7. 7440-02-0 231-111-4 Nickel and its compound
Shall not be used:
(a) in any post assemblies which are inserted into pierced ears and other pierced parts of the human body unless the rate of nickel release from such post assemblies is less than 0,2 µg/cm 2/week (migration limit);
(b) In articles intended to come into direct and prolonged contact with the
skin such as: earrings, necklaces, bracelets and chains, anklets, finger rings, wrist-watch cases, watch straps and lighteners, rivet buttons, lighteners, rivets, zippers and metal marks, when these are used in garments, If the rate of nickel release from the parts of these articles coming into direct and prolonged contact with the skin is greater than 0,5 µg/cm2 / week.

AZO dyes in jewelry.

AZO dyes are the name of the group of synthetic dyestuffs based on nitrogen that are often used in textile industry. Some AZO dye stuffs may separate under certain conditions to produce carcinogenic and allergenic aromatic amines.
Since Annex XVII of REACH came into force in 2009, the AZO Directive 2002/61/EC has been replaced by REACH regulation. AZO dyes are put on REACH Restriction List.  Leather and textile components in jewelry articles made of colored leather or other synthetic materials should contain less than 30 mg/kg.

43. 405-665-4 Azocolourants&Azo Dyes
2. Azodyes, which are contained in Appendix 9, ‘List of azodyes’, shall not be placed on the market or used for colouring textile and leather articles as a substance or constituent of mixtures in concentrations higher than 0,1 % by mass.
1. Azodyes which, by reductive cleavage of one or more azo groups, may release one or more of the aromatic amines listed in Appendix 8, in detectable concentrations, i.e. above 30 mg/kg (0,003 % by weight) in the articles or in the dyed parts thereof, according to the testing methods listed in Appendix 10, shall not be used, in textile and leather articles which may come into direct and prolonged contact with the human skin or oral cavity, such as: clothing, bedding, towels, hairpieces, wigs, hats, nappies and other sanitary items, sleeping bags, footwear, gloves, wristwatch straps, handbags, purses/ wallets, briefcases, chair covers, purses worn round the neck, textile or leather toys and toys which include textile or leather garments, Yarn and fabrics intended for use by the final consumer

How jewelry test reports look like?

This jewelry custom project involved different types of materials and components that related to all the above substances we mentioned in this post. For one of the bracelets we use synthetic colored polyester and we test for 22 different AZO dyes. In this bracelet AZO test report you can notice that the limits allowed is 30mg/kg and the result shows that none of the substances were deducted.

The silver color bracelet made of Brass and was tested for Cadmium content. In this bracelet Cadmium test report the results show content of 26mg/kg which is below the limit defined by REACH Annex 0.1% or 100 mg/kg.  For lead content test we choose to test several beads from the same jewelry project. The test report shows content of 22mg/kg much below the limit of 0.5% allowed by the EU regulation for stainless steel or fashion jewelry. For the nickel release test we choose different beads from the same project. This Nickel release report shows that the beads release less than the 0.5 µg/cm 2/week the max allowed rate for jewelry that come into direct contact with the human skin.

I hope that in this post I was able to clear some of the confusion surrounding REACH regulations  and make  toxic substances in production of stainless steel and fashion jewelry easier to understand.

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stainless steel jewelry manufacturer ad Hulpf

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How to clean stainless steel jewelry info

Stainless steel jewelry is made of a steel alloy that contains minimum of 10.5% chromium and less than 1.2% Carbon content.
The advantage is that it doesn’t corrode or rust.
Although it is also very durable, steel jewelry may get scratched and stained.
Bellow some simple rules to keep your stainless steel jewelry in good condition.

Things You will Need

1. Bowl

2. Dish-washing or window-cleaning liquid

3. Fabric

4. Towel

5. Toothpaste(optional)

6. Jewelry polish or polishing cloth(optional)

7. Bags or pouches(for maintain)

Stainless Steel Jewelry Cleaning

Stainless steel jewelry is pretty easy to clean. Simply follow below steps:

1. Pour some warm water in a little bowl, and add some mild dish-washing or window-cleaning liquid.

2. Dip a soft, lint-free fabric in the soapy water, and then gently wipe the stainless steel jewelry with the damp fabric til the piece is clean. Once cleaning it, rub the jewelry along its polish lines.

3. Wipe the remaining soap off your jewelry using a wet fabric dipped in clean water.

4. Dry the jewelry well with a clean towel, and then leave your pieces to air dry.

After your stainless steel jewelry is cleaned, you will be able to use a jewelry polish or a polishing cloth to shine it.

Some people use toothpaste to clean the especially dirty spots of their stainless steel jewelries. Keep in mind, however, that toothpaste is abrasive. If you decide to use it for cleaning, make sure it is a non-whitening brand that does not contain silica, and use a soft cloth to rub the paste onto your pieces. Don’t forget to rinse the jewelry thoroughly after you are done.

An alternative to these cleaning methods is to purchase a stainless steel cleaner from the store and follow the instructions on the package.

Stainless Steel Jewelry Maintaining and Storing

Although stainless steel jewelry doesn’t tarnish or corrode and doesn’t need special care, it will scratch. That’s why you should wear and store your pieces in a way to minimizes any contact with other items that can damage your stainless steel jewelry. If your jewelry does get scratched, you can always have it professionally polished by a jeweler.

Store your stainless steel pieces individually from jewelry made of other metals. It is best if you retain your stainless steel jewelry in individual bags or pouches.

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Hulpf teamStainless steel jewelry-earring by Hulpf

Steel jewelry casting How to?

Investment casting is one of the oldest known metal-forming techniques. In general, the jewelry cast part obtained by allowing molten steel to solidify in a mold then clean and removed to polish and further assembly if necessary.

Steel jewelry castings allow the production of irregular shapes that usually can not be done or are too costly and time-consuming to produce using CNC machine, one of the main fabrication methods for stainless steel jewelry.

Steel jewelry casting is a process of making jewelry pieces that involves the pouring of liquid steel into a mold. It is usually referred to as lost-wax casting because the casting mold is created using a wax model that is melted away to leave a hollow chamber in the middle of the mold. The technique has been used for thousands of years, and is still widely used today to make reproductions of stainless steel jewelry.

The steps in steel jewelry casting

1. Choose a model for casting. A model could be a piece of jewelry that you want to make a mold out of. You can use any piece of your own jewelry that you are interested in reproducing.

2. Build a rubber mold using your model.

  • (1) Prepare an un-vulcanized rubber molding compound. You can purchase it at your local arts and crafts supply store.
  • (2) Press your model into a appropriately sized mass of the rubber molding compound. Make sure to surround the model entirely to ensure an entire mold for casting jewelry. The compound are going to be soft and pliable till you cure it, therefore we don’t need to  worry about damaging your model.
  • (3) Subject the rubber mold to heat according to manufacturer’s directions so as to vulcanize, or cure, the rubber. The finished product can similar in consistency to a rubber bouncy ball.
  • (4) Use a surgeon’s knife to dissect the model out of the mold. Slice down the middle of the rubber mold, length-wise on the model, making a mold that opens like a book. Watch out at this stage not to harm your model with the surgical knife.
  • (5) Remove the model, being very careful to stay the mold intact, as any imperfections in your mold can lead to a imperfect wax casting.
  • (6) Cut a shallow channel into every face of the mold, resulting in the hollow chamber left by the model. The two channels ought to meet once the mold is closed along, making a tunnel in which you will insert the syringe.

3. Inject the mold with melted wax. Use any kind of crater’s wax that you purchase from an arts and crafts supply store. There are many different types of wax, and they each have different melting points, therefore experiment with a variety to find one you like the most.

  • (1) Melt the wax in a double-boiler, referring to the package directions for the proper melting temperature.
  • (2) Use a medication dosing syringe to inject the melted wax into the closed mold, inserting the syringe through the divot channel you created within the jewelry casting mold.

4. Allow the wax to cool completely. Cooling times vary, base on the particular wax you purchase. Follow package guidelines for cooling times.

5. Take away the wax model from the rubber mold. This may currently be your model for the lost-wax jewelry casting process.

6. Make a stand for the model. Cut a thin stick of hardened wax, simply large enough to support the wax model, and fix it to the model with melted wax.

7. Secure the wax model stand to the bottom of a casting flask, using more melted wax. The model ought to be propped up within the flask. It’s ready for the jewelry casting process.

8. Combine the dry ingredients of the gypsum plaster-based investment mold material with water, as per manufacturer’s directions.

9. Pour the investment mold molten steel mixture into the flask, compassing the model completely. 10. Enable the investment mold to set.

11. Place the entire flask in a kiln set to close to 1100 degrees F (600 degrees C). This may harden the mold and melt the wax away, leaving a hollow chamber within the center of the cast jewelry mold.

12. Remove the mold from the flask. 13. Pour the casting.

  • (1) Place your metal of choice in a pouring crucible, then melt it inside a foundry. The melting temperature and time are going to be determined by the sort of metal you are using.
  • (2) Pour stainless steel liquid metal from the pouring crucible into the mold through the tunnel left by the melted wax support stick.

14. Enable the metal to cool.

15. Tap the mold gently with a hammer to break away the mold and reveal the jewelry casting.

16. Buff out any irregularities on the jewelry piece using a metal buffing wheel.

Please note that the above method will enable you to produce steel jewelry using casting process but you probably encounter quality issue such s porosity, shrinkage etc..

For high quality steel jewelry casting  the process must be carefully monitor and should be done using Vacuum casting machine specially designed for stainless steel jewelry.

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Hulpf team

Jewelry trade fairs for jewelry professional

It’s that time again,  in January after we all recover from the holiday season the jewelry trade fairs first season will begin.
This year as well, the VICENZAORO Winter edition  will open the jewelry world show calendar.
The VICENZAORO held in Italy and it’s a great opportunity to get a taste from what going to happen in the coming year and enjoy great Italian authentic food.

Asia main jewelry trade fairs held in Tokyo, Bangkok and Hong Kong are mainly commercial and trading opportunity rather than trends leaders. Great opportunity to visit your suppliers and check what new in this market segment.

The jewelry show in Shenzhen, China not matures enough and usually does not worth the travel.
But if you already in the area, you don’t need to spend more than a day for in-depth visit.

If brands is your main focus. The Watch and Jewellery Show BASELWORLD is the best chance to experience brand worlds at the top most level.

Below we indexed the main jewelry trade fair information for your convenience.

World’s top jewelry trade fairs

January 18-21, 2013
MIJF-Spring 2013 Malaysia International Jewellery Fair
Kuala Lumpur Convention Centre, Malaysia
Convention Center, Malaysia http://www.elite.com.my

Jan. 19 – 24, 2013
VICENZAORO T-Gold, Glamroom,
Gem World Via dell’Oreficeria, 16 36100 Vicenza Italy
http://www.vicenzaorowinter.it

January 23-26, 2013
24th International Jewellery Tokyo
Tokyo Big Sight, Tokyo, Japan http://www.ijt.jp/en

February 4-9, 2013
Al-Ain 11th International Jewellery & Watches Exhibition
http://www.baderuae.com

February 6-10, 2013
XIX International Jewellery Forum Junwex St-Petersburg
The Fair Lenexpo Faigrounds in Gavan, Sain-Petersburg, Russia http://www.rjexpert.ru

February 22-25, 2013
IIJS Signature The Bombay Exhibition Centre,
Goregaon, Mumbai,India http://www.iijs-signature.org

February 26 – March 1, 2013
China International Gold, Jewellery & Gem Fair-Shenzhen
Shenzhen Convention & Exhibition Center,
Shenzhen,Guangdong, China www.JewelleryNetAsia.com

February 26 – March 2, 2013
51st Bangkok Gems & Jewelry Fair 2013
The Impact Challenger, Muang Thong Thani , Bangkok, Thailand http://www.bangkokgemsfair.com

April 16-18, 2013
11th International Gold & Jewelry Exhibition
Mishref, Kuwait http://www.kif.net

March 5-9, 2013
Hong Kong International Jewellery Show
Hong Kong Convention and Exhibition Centre,Wan Chai, Hong Kong http://www.hktdc.com

March 14-18, 2013
International Jewellery & Watch Show Abu Dhabi
National Exhibition Center, Abu Dhabi, United Arab Emirates http://www.reedexpo.com

March 21 – 24, 2013
36th Istanbul International Jewelry
CNR Expo Fair Center 34149 Yesilkoy – İstanbul http://www.istanbuljewelryshow.com

April 25 – May 2, 2013
BaselWorld 2013 The Basel Exhibition center, Basel, Switzerland http://www.baselworld.com

Stainless steel usage for jewelry and watches

Let’s go back to the history of a stainless steel,  which also known as inox steel or inox. The source is  from the French word inoxydable, which means a steel alloy.
Stainless steel has been discovered by Harry Brearley year back 1913 while investigating rustproof gun barrel.

Stainless steel does not easy to corrode, rust or stain as ordinary steel does, but despite the name it is not completely stain-proof. It is one minimum of 10.5% chromium and less than 1.2% Carbon content and it’s 100% recyclable.

Stainless steel is widely used as fashion jewelries as well as for other industrial applications. The most widely used stainless grades in jewelry production are the austenitic 304 and 304L. The second most used grades are the molybdenum-alloyed austenitic steels 316/316L.

Steel crystalline structure classifications are as follows:

  • • Austenitic crystalline structure: austenite steels has 70% total stainless steel production. It comprises 0.15% carbon, 16% chromium, and adequate nickel or manganese.
    • Ferritic stainless steels: it comprises 10.5% and 27% chromium, small amount of nickel and some lead. The contents include molybdenum, aluminum or titanium.
    • Martensitic stainless steels: comprises chromium (12–14%), molybdenum (0.2–1%), nickel (less than 2%), and carbon (about 0.1–1%).
    • Precipitation-hardening martensitic stainless steels: precipitation hardened to higher strengths. Most common, 17-4 PH, uses about 17% chromium and 4% nickel.
    • Duplex stainless steels: mixed microstructure of austenite and ferrite, produce a 50/50 mix, and commercial alloys 40/60. Consists of high chromium (19–32%) and molybdenum (up to 5%) and lower nickel contents.

The highest demand of fashion stainless steel jewelry

As we go through the newest era, many of us envision what the future awaits and what it offers. When it comes to the hottest fashion of jewelry right now, stainless steel owns its place whether for men, women and youngsters. Widely used by  world’s leading fashion brand jewelry and watch manufacturers.

To mention the famous brands, which include Fossil, Guess, DKNY, and Ben Sherman are made especially to enhance and discover the true elegance and wonders of stainless steel jewelry.

The fresh and impressive art of these jewelries are hard to resists because once you see it you cannot turn your back without buying one of them. It is just like a temptation that will never go away unless you can taste and satisfy that urge. Its alluring and gorgeous designs and its different varieties  offers a wide range of unique colors, and artistic shapes.

When it comes to durability, the stainless steel excels from gold and silver because of its naturally hard alloy. It can be handled for a longer period of time apart from its 100 % recyclable materials. Versatility is one of its characteristics since the wide range of selective stainless steel fashion jewelry could conform to all of our needs, which exactly fit our desired style and fashion ways. Therefore, when it talks about stainless steel jewelries there is no second thought. That it is competitive and practical preferences, the first and world-class choice of this age of generation. As beauty comes in the eye of the beholder, stainless steel jewelry found its grace and essence through the entire fashion history of this 21st century.

Stainless steel jewelry production in China.

Hi there,

In this blog, we briefly describe the steps and techniques used in a modern Stainless steel jewelry production process. We will also try to answer clients questions which we couldn’t address on our FAQ page.

Why did we decide to write a blog?

Opposite to tradition steel jewelry wholesale we mainly provide stainless steel production services to brands. Local and international in different price segments.
Our interaction with the designers and the clients during the development and production stages is way more intensive than traditional companies.
We learn from our experience that the right information and knowledge can save our customer a lot of money.
When our clients have the right information we able to achieve smoother and faster development and production process.

It is not our aim to make you a stainless steel jewelry production expert.

Rather we aim at presenting the general outline and information for our customers and those who may not be familiar with Stainless steel jewelry production process.
You should be able to…

  • Understand the impact of the fabrication process on issues such as cost and quality
  • Discover alternative Ways to reduce your stainless steel jewelry collection cost.
  • learn how to design a new stainless steel collection with budget in mind.

A professional industry insight for anyone that need to better control their stainless steel jewelry production in China.

We encourage you to ask  questions. It is our best way to learn.
Questions related to stainless steel production, design and development Contact us here

Comments or suggestions? please join the conversations.
If you want to guest post on this blog please contact us.

Hulpf team

Stainless steel jewelry production and private label services By Hulpf