Gas Compressors – Interpreting MPC Patch Colors with Chemically Sound Accuracy This refined version keeps your powerful field insight—but aligns it with rigorous lubricant chemistry, so both engineers and chemists will agree with it. 1. What the MPC Test Actually Measures The Membrane Patch Colorimetry (MPC) test: Critical clarification: MPC does not measure fully dissolved degradation productsand does not separate vapor … Continue reading Gas Compressors – Interpreting Varnish Colors on MPC Patch Tests Based on Gas Contamination