color changing spoons

i am trying to research the plastic used in the infant spoons that change color when heat/hot foods are present. Does anyone know what kind of plastic/polymer is used in these type of products or where i can find the info. thanks!

look into thermochromic paints and pigments there is some info available online, but you may be best served to directly contact a vendor.

It might be a bit too late, but hope this helps!

http://www.glscorp.com/pdf/casestudies/too_hot.pdf

have been in contact with these guys before and were very helpfull to me:

just check it out & regards!