Contact angles for TCE (CAS 79-01-6) cleaned solid and fin parts were averaged and then used as a reference for cleanliness during this test. The dirty parts were pre-soiled with Oak 7a lubricant (CAS: 64742-53-6; 68909-65-9), and each solvent used one solid and one fin part for testing. The fin parts were flattened using a hammer on one side to record the dirty contact angle and the other half of the part was kept intact (See Appendix for an image of solid and fin parts).
Parts were immersed, one at a time, in a heated beaker (80 F) filled with Fluosolv NC-786 and repeated for the Honeywell products at room temperature (68 F) for five minutes. The clean contact angles were measured shortly after cleaning, and the intact fin parts were flattened to compare both sides of the part to ensure more complex geometries were cleaned.