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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 ...
The iron-based atramentum called iron gall ink was in popular use from about the 12th to 19th century. It is currently a subject of conservation effort since many valuable collections are written using it but it causes ink corrosion.
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 ...
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 ...
Iron gall ink was used in fountain pens when they were invented but has the disadvantage of causing corrosion to metal parts. Modern formulations of iron gall ink are somewhat less corrosive and are still occasionally used in applications that require permanence. Bottle of green ink. Red inks usually contain the dye eosin. Blue inks often ...
The effectiveness of a corrosion inhibitor depends on fluid composition and dynamics. Corrosion inhibitors are common in industry, and also found in over-the-counter products, typically in spray form in combination with a lubricant and sometimes a penetrating oil. They may be added to water to prevent leaching of lead or copper from pipes. [2]
Haematoxylin was also added to some iron gall inks, which take time to fully darken when applied to paper. [4] [37] In this case the Haematoxylin provided some initial colour before the iron gall reached its full depth of colour. [4] [37] William Lewis in 1763 is credited with being the first to use haematoxylin as an additive in iron gall inks ...
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