Creating Pink Sterling Silver: Chemistry and Heat Treatment Explained"

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Discussion Overview

The discussion centers on methods to create a pink hue in sterling silver, exploring both chemical adjustments to the alloy and potential heat treatment techniques. Participants consider the implications of alloy composition and surface treatments in achieving the desired coloration.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about altering the chemistry of sterling silver, which is typically 92.5% silver and 7.5% copper, to achieve a pink hue.
  • Another participant suggests that the thickness of silver plating may relate to the coloration, although they later clarify that sterling silver is an alloy and not plated.
  • A different participant mentions the existence of colored wire for artists, implying that there may be alternative materials or methods to achieve color.
  • One contribution discusses the use of a caustic solution containing sulfur and a battery to anodize silver, noting that this method could potentially color the metal but may be difficult to control.
  • Another participant points out that heating sterling silver in an acidic bath contaminated with iron can lead to a pink surface coloration, sharing a practical example from jewelry fabrication.

Areas of Agreement / Disagreement

Participants express various methods and ideas without reaching a consensus on the best approach to create a pink hue in sterling silver. Multiple competing views and techniques are presented, indicating that the discussion remains unresolved.

Contextual Notes

Participants acknowledge limitations in the availability of colored metals and the challenges associated with achieving specific hues through alloying or surface treatments. The discussion reflects uncertainty regarding the effectiveness and control of proposed methods.

skwak
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Does anyone know of any way to create sterling silver with a pink hue? Since Sterling Silver by definition must be 92.5% silver, chemically you can only adjust the remaining 7.5%. This is typically copper anyway but at that level, the alloy is not pink at all. Can this be done by altering the chemistry? If not, can it be done by heat treating?

Any thoughts?
 
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Doesn't it have to do with the thickness of the silver plating?
 
alxm said:
Doesn't it have to do with the thickness of the silver plating?

Actually sterling silver is an alloy and has no plating. The alloy is typically 92.5% silver and 7.5% copper. The result is a very white body. We are looking for one with a pink hue.

Thanks!
 
It seems you can use a caustic solution containing sulfur and a battery to anodize silver and color it that way. Never tried it, but it looks easy enough. It happens fast, so it won't be an easy process to control unless you change the strength of the solution and/or the potential of the anodizing wires.

http://www.instructables.com/id/Make_Silver_Different_Colors_by_Anodizing/
 
skwak said:
Actually sterling silver is an alloy and has no plating. The alloy is typically 92.5% silver and 7.5% copper. The result is a very white body. We are looking for one with a pink hue.

Okay, I see. I thought that you'd seen some pink silver and wanted to reproduce the effect. So.. you're trying to find a pink alloy? That sounds problematic - metals don't really come in a lot of colors, and if copper's not going to do it...

The only really practical way I can think of would still have to be a surface thing, like anodization.
 
Thanks for the link :cool:
 
Sterling silver will acquire a definite pink surface coloration if it is heated in an acidic bath ( pickling solution) which is contaminated by a piece of iron.
This happens sometimes in jewelry fabrication when we make the error of using steel twezers instead of copper ones, in which case, the bath must be neutralized and a new one made.
A.M.
 

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