What causes the glossy and smooth edges observed on a casting?

Show Answers

Contraction of the metal as it coolsFailure of the investment materialWax not fully removed during the processTrapped gases not properly expelled

Explanation

Glossy and smooth margins on a casting typically result from incomplete removal of wax during the casting process. If the wax is not entirely eliminated, it affects the surface finish, leading to these characteristics. Other factors like metal shrinkage, investment breakdown, or gas entrapment cause different defects.