In spin casting, which surface is determined by the mold?

In spin casting, which surface is determined by the mold?

• A. Front
• B. Back
• C. Edge
• D. Center

Answer: (A)

In spin casting, the mold determines the surface that actually contacts the liquid and takes shape—the front surface. As the material spins, it is pressed against the mold cavity, imprinting its curvature and features onto the front face as it cures. The back surface, in contrast, is formed against the opposite surface or second mold, not by the same front mold. The edge and the center aren’t the surfaces defined by the mold in this context, so the front surface is the one set by the mold.

In spin casting, the mold determines the surface that actually contacts the liquid and takes shape—the front surface. As the material spins, it is pressed against the mold cavity, imprinting its curvature and features onto the front face as it cures. The back surface, in contrast, is formed against the opposite surface or second mold, not by the same front mold. The edge and the center aren’t the surfaces defined by the mold in this context, so the front surface is the one set by the mold.