Air drying hydrogen fluoride indicative paint based on alkyd resin. [...]
Changes from green to yellow at 350°C, from yellow to off-white at 550°C. [...]
Changes from ochre yellow to reddish brown at 245°C. [...]
Changes from pink to blue at 145°C, from blue to grey at 320°C. [...]
At 58–62°C the paint becomes transparent, revealing the colour of the underlying primer. [...]
Changes from dark grey to off-white at 525°C. [...]
Changes from green to blue at 230°C, from blue to off-white at 330°C. [...]
