Engineer's blue

Engineer's blue (also known as scraping blue, Prussian blue, or simply bluing) is a highly pigmented paste used to assist in the mating of two or more components. It is applied to one of two surfaces that typically are required to be in perfect contact, for example a surface being processed to be flat and a standard perfectly flat surface. The blue is transferred only in places where the surfaces are in contact, revealing where work must be done.

This page is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.