Emulsions

To measure wet film thickness, the gauge is rolled over a freshly coated substrate at the highest range position. The outside rim will pick up the material only at and below the actual film thickness, which permits immediate and direct reading. The wheel is then lifted, placed on another part of the substrate with the wheel at the original position and rolled in the opposite direction.Examination of the measuring rim will show positions at which pick-up took place and each point will...