Bruce Girrell on fri 6 aug 99
Tony Hansen wrote:
> "I got this request:
> I am looking for a supplier of a glaze I recently encountered.
> It is black at room temperature, but becomes clear when heated.
> I saw it on a coffee cup that has a message that
> appears when the hot coffee is poured in."
I think what you are looking for is a thermochromic ink. I doubt that there
are any glazes that exhibit the property that you want. Thermochromic inks
incorporate liquid crystals that change color at some particular temperature
and are often silk-screened onto coffee mugs or similar items.
Bruce "my insight for the day" Girrell
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