Blotter Spot Testing for Metallic and Other Solid Particles

The blotter spot test has been discussed numerous times in the pages of Machinery Lubrication magazine. It not only is one of the oldest oil analysis tests (mid-19th century) but endures as one of the most effective at detecting and even quantifying certain lubricant abnormalities.

 

Blotter Spot Testing for Metallic and Other Solid Particles