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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 ...
However, iron gall ink is corrosive and damages paper over time (Waters 1940). Items containing this ink can become brittle and the writing fades to brown. The original scores of Johann Sebastian Bach are threatened by the destructive properties of iron gall ink. The majority of his works are held by the German State Library, and about 25% of ...
This iron gall ink recipe is taken from the Household Cyclopedia of General Information, published in 1881. It is not in common use now, though the preparation of inks with similar methods was common at one time. Recipe for one imperial gallon (4.5 L) of ink: 12 ounces (340 g), nut-galls; 8 ounces (230 g), sulfate of indigo; 8 ounces (230 g ...
Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates to improve corrosion resistance or lubrication or as a foundation for subsequent coatings or painting. [1] [2] [3] It is one of the most common types of conversion coating.
It can use waterproof, pigmented, iron gall ink, particle-and-binder-based inks, such as India ink, drawing ink, and acrylic inks with ease; while fountain pens generally must use water based inks, require thorough and frequent cleaning to prevent clogging when used with pigmented or waterproof inks and may corrode when used with iron gall ink ...
Iron gall ink is produced by treating a solution of tannins with iron(II) sulfate. [72] Tannins can also be used as a mordant, and is especially useful in natural dyeing of cellulose fibers such as cotton. [73] The type of tannin used may or may not have an impact on the final color of the fiber.
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The treatment report will indicate what type of structural treatment should be used. If the item is missing hardware it can be replaced by adding matching or similar screws and rivets. Adhesives, soldering, and welding can be used to repair a damaged structure. Protective coatings. Protective coatings can be good options for iron and steel objects.