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

During the etching process, bubbles form along the exposed metal areas as a byproduct of the chemical reaction between the acid and the plate. These bubbles can block the acid from evenly biting into the metal, leading to inconsistent or incomplete lines in the final design.

• Cause: Bubbles form due to the reaction between the acid and exposed metal.
• Effect: Bubbles can prevent uniform etching, resulting in flawed designs.
• Solution: Brushing them away gently ensures sharp details and consistent etching.