Membrane patch colorimetry (MPC) varnish potential testing (ASTM D7843) is an essential analytical test to determine the propensity for a lubricant to form varnish deposits.

With the probability of varnish-related failures reported to be as high as 100% (GE TIL 1528-3), monthly MPC testing is recommended for all critical turbine installations.

The ASTM-approved MPC test is straightforward and can be completed as part of your existing lubricant analysis testing program. It can also be performed on-site using a modified test method for rapid assessment of potential varnish-related problems.

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