Question

The bubbles which tend to collect along the exposed metal are brushed away gently because -

• A. They will cause the etched lines to be uneven.
• B. They will change the chemical components of the acid.
• C. They will stick onto the plate which will make printing difficult.
• D. They will melt the plate.

Hint:

Bubbles create uneven lines.

Answer 1

The Correct Option is A

In etching, the chemical reaction between acid and plate generates bubbles on exposed metal areas. These bubbles impede the acid's uniform etching, causing inconsistent or incomplete lines in the design.

• Cause: Acid-metal interaction generates bubbles.
• Effect: They hinder uniform etching, leading to design flaws.
• Solution: Gentle removal ensures sharp detail and consistent etching.