D-350 is a hi-temp developer used to enhance penetrant indications on parts at elevated temperatures, temperatures up to 3500F (176.70C). D-350 is the developer step in a three part high temperature system (KO-17 hi-temp penetrant and a KO-19 hitemp remover are the other materials of the hi-temp system). D-350 complies with low sulfur and low halogen requirements.
Specifications:
MIL-I-25135 Revisions
ASME Code NDT, Sec V
