Question

The primary ingredient of acid-resist ground is -

• A. Camphor
• B. Asphaltum
• C. Linseed oil
• D. Lamp black

Hint:

Asphaltum is for acid-resistant ground.

Answer 1

The Correct Option is B

Asphaltum is the main ingredient in acid-resistant ground used in etching. It creates a durable coating that protects the metal plate from acid exposure.

• Function: Provides a protective coating for the metal plate during the etching process.
• Application: The ground is applied evenly to the plate, and the design is scratched into it using an etching needle.
• Role in etching: Ensures that only the exposed areas of the metal are etched, preserving the integrity of the surrounding surface.