Acid Resist - Acid-proof protective coating applied to metal plates prior to etching. An acid-proof coating applied to metal plates prior to etching designs thereon. Bichromated solutions employed in photoengraving as sensitizers provide acid resist through the action of light on sensitized surface.
Acid Resist - Acid-proof protective coating applied to metal plates prior to etching. An acid-proof coating applied to metal plates prior to etching designs thereon. Bichromated solutions employed in photoengraving as sensitizers provide acid resist through the action of light on sensitized surface.
