Aluminum Test Block (for Sensitivity) 

Aluminum Test Block (for Sensitivity) Cracked aluminum block compares sensitivity of different penetrants or sensitivity of new and old penetrants.

The Aluminum Test Block is an aluminum test piece that measures 3? (75mm) x 2? (50mm) x 3/8? (9.5mm) with a 1/8? (3.2mm) wide with a milled notch that separates the blocks two sides to facilitate side-by-side penetrant comparison. The test block is used to check the strength of “in-use” penetrants. This is done by processing one half of the block with “used” penetrant, and the other half with fresh penetrant.