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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 ...
What you should do if the stain persists: Unfortunately, some ink stains on clothing aren’t going to come up. “If the ink has been in the fabric for days or longer there’s a chance that it ...
A Ziehl–Neelsen stain is an acid-fast stain used to stain species of Mycobacterium tuberculosis that do not stain with the standard laboratory staining procedures such as Gram staining. This stain is performed through the use of both red coloured carbol fuchsin that stains the bacteria and a counter stain such as methylene blue .
India ink – a type of ink; Ink – a substance used to stain or dye; Ink blotter – a pad used to absorb excess ink; Inkpot – a low-lying bottle used to hold ink; Inkwell – a low-lying bottle used to hold ink; Iron gall ink – a purple-black or brown-black ink made from iron salts and tannic acids
Haematoxylin alone is not an effective stain, but when oxidized to hematein, and combined with a mordant, stains chromatin in cell nuclei dark blue to black. [ 1 ] [ 7 ] [ 25 ] [ 10 ] The colour and specificity of haematoxylin stains are controlled by the chemical nature, and amount, of the mordant used, and the pH of the staining solution ...
A "vital dye" or stain is a dye capable of penetrating living cells or tissues without causing immediate visible degenerative changes. [26] Such dyes are useful in medical and pathological fields in order to selectively color certain structures (such as cells) in order to distinguish them from surrounding tissue and thus make them more visible ...
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The armed guerrilla Shining Path of Peru has repeatedly threatened to kill those found with indelible ink stains to dissuade from participation in elections. [5] [6] In the 2004 Afghan presidential election, allegations of electoral fraud arose around the use of indelible ink stains, which many claimed were easily washed off. [7]
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