Friday, 31 March 2017

Stamps with Thermochromic Ink Printing - Update

Category -  Touch 
Subcategory - Stamps with Thermochromic Ink Printing

United Kingdom 2001 The Weather Miniature sheet with thermochromic ink printing 

Issue date 13 March 2001 

Royal Mail has issued a special commemorative miniature sheet on the Weather with 4 stamps showing designs on rain, sunshine, storms and dry weather.

The 27p stamp featuring sunshine includes thermochromic ink, when the ink is touched or rubbed for a few seconds, the heat from the finger changes its color from reddish violet to light blue. 

To view other stamps in this category click on the following link - 
Stamps with Thermochromic Ink Printing

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