Category - Touch
Subcategory - Stamps with Thermochromic Ink Printing
Sierra Leone 2019 Towards Year of the Rat
Issue date 25 July 2019
Sierra Leone Post to commemorate the 2020 Chinese Lunar Year of the Rat has issued 2 sets each (one perforate and one imperforate) special minisheets - one with one stamp and the other with four stamps.
The 2 minisheets have been issued with perforated stamps and with imperforated stamps and have been printed with thermochromic ink which react to warm temperature of the fingers and the parts printed with this ink disappears due heat of the fingers when touched.
To view other stamps in this category click on the following link -
Stamps with Thermochromic Ink Printing
Disclaimer - Information about the stamp issues on this page has been taken from the net and are for informational purposes only. No copyright claim is made for the above mentioned information/pictures. The pictures/videos have been scanned from my collection.
Subcategory - Stamps with Thermochromic Ink Printing
Sierra Leone 2019 Towards Year of the Rat
Issue date 25 July 2019
Sierra Leone Post to commemorate the 2020 Chinese Lunar Year of the Rat has issued 2 sets each (one perforate and one imperforate) special minisheets - one with one stamp and the other with four stamps.
The 2 minisheets have been issued with perforated stamps and with imperforated stamps and have been printed with thermochromic ink which react to warm temperature of the fingers and the parts printed with this ink disappears due heat of the fingers when touched.
To view other stamps in this category click on the following link -
Stamps with Thermochromic Ink Printing
Disclaimer - Information about the stamp issues on this page has been taken from the net and are for informational purposes only. No copyright claim is made for the above mentioned information/pictures. The pictures/videos have been scanned from my collection.
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