Question

In electroforming process, to obtain an electroformed die, what is the rationale for metallizing using silver?

• A. Make the die abrasion resistant
• B. Make the die hard
• C. Promote conduction of electric current
• D. Make the die smooth

Hint:

Electroforming requires a conductive surfaceSilver coating provides electrical conductivity for uniform metal deposition.

Answer 1

The Correct Option is C

Step 1: Understanding Electroforming.
Electroforming is a process in which a metal layer is deposited over a surface using electroplatingThe impression surface must be electrically conductive for metal deposition to occur
Step 2: Role of Silver Metallization.
Impression materials are generally non-conductiveTo allow electroplating, the surface is first coated (metallized) with a thin layer of silverSilver has excellent electrical conductivityThis enables uniform flow of electric current during electroplating
Step 3: Analysis of Options.
(A) Abrasion resistance is achieved by the final electroplated metal, not by silver coating
(B) Hardness is determined by the electroformed metal layer
(C) Silver coating ensures electrical conductivity necessary for electroforming
(D) Smoothness depends on impression accuracy, not silver coating
Step 4: Conclusion.
Therefore, silver is used to promote conduction of electric current during electroforming