WHAT TYPE OF SURFACE FINISH CAN I EXPECT FROM AN INVESTMENT CASTING?

Because the ceramic shell is built around smooth patterns produced by injecting wax into a polished metal mold, the resultant casting finish is excellent. A 125 microfinish is standard and even finer finishes (63 or 32) are not uncommon on aircraft engine castings.

Each foundry has its own standards for surface blemishes (positives, negatives), these are discussed and agreed upon with the customer based on the function and cosmetic requirements of the part prior to release of the tooling order.