Critical temperature indicator

A method of forming a temperature indicator, which includes:

• providing a blister film container having a translucent portion,
• loading a first color temperature sensitive non-liquid that contains high density pigment into said blister film container in a position to cover said translucent portion wherein said first color temperature sensitive non-liquid will convert to liquid when it is exposed to temperatures below a set threshold temperature,
• loading a second color temperature sensitive non-liquid that contains lower density pigment into said blister film container adjacent said first color temperature sensitive non-liquid in a position such that only said first color temperature sensitive non-liquid is seen when viewing through said translucent portion and wherein said second color temperature sensitive non-liquid will convert to liquid when it is exposed to temperatures below the set threshold temperature and such that when said non-liquids convert to liquid, a permanent color change occurs from density shift of said colorants, and
• providing a backing onto said container to seal said temperature sensitive non-liquids in their positions.