Temperature indicating insulating sleeve for a cooking vessel

A method of constructing a temperature indicator for a cooking vessel having an internal cavity for receiving a material to be heated and an outer side surface, comprising the steps of:

• providing a thermal insulator to be placed over the sides of said vessel, said thermal insulator having an opening therein to expose an area of said vessel side surface;
• providing a non-opaque substrate;
• providing a layer of thermochromic ink on an inner side of said substrate said ink being adapted to change from a dark color to a clear color when exposed to a predetermined temperature;
• providing a layer of indicia material on the inner side of said thermochromic ink layer, said layer of indicia material including indicia that is visible from an outer side of said substrate when said layer of thermochromic ink changes to a non-opaque color;
• and
• locating the combination of said substrate, said layer of thermochromic ink, and said layer of indicia material on an inner side of said thermal insulator opening.

A temperature indicator for a cooking vessel having an internal cavity for receiving a material to be heated and an outer side surface, comprising:

• a thermal insulator covering a majority of a side surface of said cooking vessel, said thermal insulator having an opening to said side surface of said cooking vessel;
• a screen to be disposed in close proximity to said side surface of said cooking vessel, said screen disposed over an inner side of said opening formed in said thermal insulator;
• said screen comprising:
• a layer of thermochromic ink disposed on an inner side of said substrate and adapted to change from a dark color to a clear color when exposed to a predetermined temperature as caused from the transfer of heat from the vessel outer side surface;
• and
• a layer of material disposed on the inner side of said thermochromic ink layer and including indicia that is visible from an outer side of said substrate when said layer of thermochromic ink changes to a transparent color.