Temperature indicating paint

Abstract

A temperature indicating paint comprises 4 wt % to 40 wt % sodium alumino sulpho silicate, 1 wt % to 38 wt % nickel antimony titanate and the binder comprises 25 wt % to 50 wt % silicone resin 10 wt % to 30 wt % acrylic resin each excluding solvent. This composition undergoes color changes occur, these are; Blue 520-560° C.; Light Blue 950-990° C.; Light Yellow 1000-1040° C.; Glazed Black 1160-1200° C. The color changes are particularly distinct and enable accurate analysis particularly, but not exclusively, in gas turbine engines.

Dependencies are inferred from the claim text.