Quick Tip For Identifying Fire Scale On Sterling Silver
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- Опубликовано: 17 окт 2024
- In this video, Professor John Ahr of the Online Jewelry Academy gives viewers a great tip on how to find fire scale on a silver surface. All you need is a sheet of white paper to reflect onto the silver surface in question.
You can remove fire scale using abrasive processes like sanding and polishing. Or, you can hide it through plating or frosting. Frosting is a depletion plating process where the metal is heated to about 850 degrees, cooled, pickled, and brass brushed as many as twenty times. This raises a fine silver layer that will hide fire scale.
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Awesome tip, thanks John. Merry Christmas
Glad you liked the tip Buddy. Happy Holidays!
Merry Christmas you jolly soul!
Thank you Grace for your holiday wishes.
Thank you for your support! : )
Very very beautiful ..... I wish you every success in your work
Thank you for the compliment.
Thanks for your support! : )
Hi John. Can you get rid of that grey in the seam by burnishing a little?
No, you would either need to raise the Fine silver through “frosting” (the OJA has a video on frosting), or you would need to plate over it. 😀
If you want to remove fire scale from silver in selective areas--as I do on my work when I patinize design elements very dark--here's an interesting chemical discovery I made. Without pickling, firescale takes a lot of polishing to remove. However, if you first paint pickle on firescaled areas you want to be bright silver, it's then removed by household silver paste polish. without much effort This only works if you first paint on sodium bisulfate pickle (then wash off). The oxides are changed chemically into a form that's easily removed by silver polish. This method doesn't work unless you paint on pickle solution--I've tried both methods.
Interesting comment Kurt. I'll have to try it out sometime. By the way, there are a number of products on the market designed to reduce fire scale. I wonder if any are merely sodium bisulfate.
Thanks for your support! : )
John--that's good to know! So far, firescale has been my friend--to get deep black patina on silver without the use of that crazy product with tellurium. If you first remove the firecale before patinizing, you won't get the deepest blacks. Well, that's just something I found by trial and error that other students might find interesting. :)
How does one frost over it?
Light heating to turn the metal dull followed by pickling and brass brushing at least 7 times should frost a piece. You are using depletion plating to create a layer of pure silver.
Thanks for your support! : )