Stuarts Micrometer Blue

Stuarts Micrometer Engineers Marking Blue
Oil based paste for indicating high spots on machine bearings, machine tool beds etc. Easily removable with methylated spirit. Normally known as Engineers Blue, this thick blue grease which is used as a thin even smear so when two parts are fitted together the area of contact is marked by the transference of the blue colour. When Engineer's blue is mixed with methylated spirits it forms a quick drying stain which is known as marking blue or layout dye. This stain is used in the marking out operation in metalworking with various tools.