In Reply to: Re: White Acid posted by Steve Carter on August 14, 19102 at 18:24:13:
Thank you Steve.. This is a great help.
I have also been doing a little research and found that ammonium bifluoride disilved in water can do the same thing, although I have not found any recipes for the ratio of water to ammonium bifluoride. I have also learned that ammonium bifluoride is a fair bit safer to use than the hydrofluoric acid/soda mixture.
I think I will probably screen 2 coats of asphaltum resist for clearing the pattern with hydrofluoric acid.
Darryl Gomes
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