thermography powders

[huilian]

What are thermography powders made of? What happens when they melt?

[rccatnap]

I'm not sure what they're made of but if you check this link, it tells you what happens to them when heated.
http://en.wikipedia.org/wiki/Thermography
Hope this helps.

[rccatnap]

You could also ask the printers, but they may feel it's a trade secret.
http://www.abbotprint.co.uk/pages/thermo.htm