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2. India ink - Wikipedia

   en.wikipedia.org/wiki/India_ink

   India ink (British English: Indian ink; [1] also Chinese ink) is a simple black or coloured ink once widely used for writing and printing and now more commonly used for drawing and outlining, especially when inking comic books and comic strips. India ink is also used in medical applications.

3. Negative stain - Wikipedia

   en.wikipedia.org/wiki/Negative_stain

   For bright-field microscopy, negative staining is typically performed using a black ink fluid such as nigrosin and India ink.The specimen, such as a wet bacterial culture spread on a glass slide, is mixed with the negative stain and allowed to dry.

4. Ink cartridge - Wikipedia

   en.wikipedia.org/wiki/Ink_cartridge

   Two cartridges; one with black ink (a third-party HP 15 compatible cartridge), one with colored inks (an original type HP 17 tri-color cartridge) currently installed in an HP inkjet printer. An ink cartridge or inkjet cartridge is a component of an inkjet printer that contains ink to be deposited onto paper during printing . [ 1 ]

5. Staining - Wikipedia

   en.wikipedia.org/wiki/Staining

   This can be achieved by smearing the sample onto the slide and then applying nigrosin (a black synthetic dye) or India ink (an aqueous suspension of carbon particles). After drying, the microorganisms may be viewed in bright field microscopy as lighter inclusions well-contrasted against the dark environment surrounding them. [ 6 ]

6. Ink - Wikipedia

   en.wikipedia.org/wiki/Ink

   India ink was invented in China, [11] [12] though materials were often traded from India, hence the name. [11] [12] The traditional Chinese method of making the ink was to grind a mixture of hide glue, carbon black, lampblack, and bone black pigment with a pestle and mortar, then pour it into a ceramic dish to dry. [11]

7. Nigrosin - Wikipedia

   en.wikipedia.org/wiki/Nigrosin

   Structure of a major component of the dye nigrosin. In staining dyes, nigrosin (CI 50415, Solvent black 5) is a mixture of black synthetic dyes made by heating a mixture of nitrobenzene, aniline, and hydrochloric acid in the presence of copper or iron. [1] Related to induline, it is a mixture of phenazine-based compounds.