finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
(current
topics)
topic 5171

NICKEL FREE ON JEWELRY


(2000)

IN OUR SHOP WE HAVE BEEN TRYING TO GET Ni FREE JEWELRY

WE USE A LAYER OF 2.5 MICRONS OF Ag OVER A Cu LAYER (WE JUST SKIP THE Ni LAYER AND INCREASE THE Ag LAYER)

IS THERE ANOTHER WAY TO GET Ni FREE JEWELRY WITHOUT USING A Co , BRASS OR Pa LAYER ?, BECAUSE THOSE ARE SO EXPENSIVE

JOSE M ROA
- PERU


(2000)

Instead of silver you should use an alloy of Sn-Cu on top of the acidic copper. This alloy looks much like nickel and was designed especially for nickel-free jewelry.

sara michaeli
sara michaeli signature 
Sara Michaeli
chemical process supplier
Tel-Aviv, Israel



(2000)

A white bronze consisting of copper:tin:zinc is a very good replacement as it also has leveling properties together with excellent corrosion resistance.

Karen Sant
- United Kingdom


January 28, 2012 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. I would like to know if nickel copper zinc alloy imitation jewelry silver plated and then electrophoretic coating would manage to cover the nickel and test nickel free if tested

Rick Wency
- india

January 30, 2012

Hi, Rick.

I don't think that's quite the right question. At some point the lacquer and silver will become sufficiently porous that the wearer of the jewelry may acquire a lifetime of nickel allergy from it. The tests exists for the purpose of ensuring that people will not be exposed to nickel, so they will probably be revised as necessary to prevent this. Isn't there a nickel-free alloy you can use? Good luck.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.