Looking for reversible thermo chromic pigment or paint
I am looking for reversible thermo chromatic pigments (or paint / ink, even paper) in europe. For now, the best I've found is 480â¬ including shipping and VAT for 1kg of pigment (32Â°C), which should allow to make about 5kg of paint, which would allow painting 20-25mÂ² (one layer). If you add the price for white paint, is come to 25â¬ for 1 square meter, which is not so expensive, but I need half a square meter, not 20 !
Any advice ?