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Inks that are visible for a period of time without the intention of being made visible again are called disappearing inks. Disappearing inks typically rely on the chemical reaction between thymolphthalein and a basic substance such as sodium hydroxide. Thymolphthalein, which is normally colorless, turns blue in solution with the base.
A voter's left hand index finger stained with election ink. 15th Malaysian general election. Electoral stain is a practical security feature to prevent double voting in elections. Ink is typically applied to the left-hand thumb, over the nail and finger in a straight line, especially to the cuticle, where it is almost impossible to remove ...
1887 British Consular Service revenue stamp printed in green fugitive ink. Fugitive pigments are impermanent pigments that lighten, darken, or otherwise change in appearance or physicality over time when exposed to environmental conditions, such as light, temperature, humidity, or pollution.
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Iron gall ink (also known as common ink, standard ink, oak gall ink or iron gall nut ink) is a purple-black or brown-black ink made from iron salts and tannic acids from vegetable sources. It was the standard ink formulation used in Europe for the 1400-year period between the 5th and 19th centuries, remained in widespread use well into the 20th ...
Shutterstock New ink! Amanda Bynes added a trio of tattoos to her collection shortly after removing the heart-shaped one from her face. Amanda Bynes Through the Years: Photos Read article The ...
Ink Master star Ryan Hadley has died at age 46 after battling cancer. The news was confirmed on Friday, June 21, via Hadley’s Instagram account almost one month after the tattoo artist revealed ...
"After the ink fades away, there is a possibility that the skin’s pigment may look lighter or darker in the area. This is a result of the tattoo process itself. Ephemeral tattoos, just like permanent ones, cause trauma to the skin, and this slight difference in pigmentation is a result of the skin’s healing process."' [11]