What is iron gall ink made of?
Iron gall ink contains three ingredients, plus water: oak galls, ferrous sulphate, and gum arabic.
What is iron tannate ink?
By mixing tannin with iron sulfate, a water-soluble ferrous tannate complex is formed. Because of its solubility, the ink is able to penetrate the paper surface, making it difficult to erase. When exposed to air, it converts to a ferric tannate, which is a darker pigment.
What is iron gall ink used for?
When properly made, iron gall ink is blue-black and permanent. Unlike carbon ink, it etches the writing surface and can’t be easily washed off, quickly making it the preferred ink for writing on parchment. It remained in use well into the 20th century whenever permanent ink was necessary.
Is iron gall ink corrosive?
Background: Iron gall ink has been used for the last several centuries, and some formulations can be extremely corrosive to documents. The ink can render manuscripts and other documents illegible and inaccessible by causing loss of text, bleeding, fading, strike-through and acid migration.
How do you make iron gall ink?
Iron gall ink is produced by the reaction of tannic acid extracted from galls, a type of growth on trees (especially oak), with ferrous sulphate (FeSO4)….
- Break the galls into pieces. approximately５g.
- Add the water to the ground galls.
- Filter the gall and water mixture.
- Add the ferrous sulphate.
- Add the gum arabic.
Is iron gall ink waterproof?
Iron Gall inks are waterproof and require compliance with a number of recommendations. Following these guidelines will protect and prevent any problems that might occur during the use of Iron Gall inks in fountain pens.
How do you make tannin ink?
Historically, tannins extracted from oak galls were used for making ink by mixing them with iron compounds, such as iron(II) sulfate to form complex, water-soluble blue-black compounds. On standing, the complex becomes darker and insoluble, producing a permanent ink, called iron gall ink.
Is iron gall ink safe for fountain pens?
Iron Gall inks should be used in fountain pens that we use regularly. Do not use Iron Gall inks in pens that tend dry out when you leave them for relatively short period of time.
How do you store iron gall ink?
Proper housing for collections containing iron-gall ink is necessary as it can mitigate some aspects of damage and deterioration. A housing, such as a box can protect collections from damage by environmental elements, such as water, dust, light.
What are the ingredients in ink?
Ink is made with a combination of ingredients including varnish, resin, solvents, pigments, and additives including waxes and lubricants. Black ink is made using carbon black pigments, and white pigments like titanium dioxide can be used to lighten other ink colours.
What ingredients are in Indian ink?
Also known as Chinese ink, Indian ink stems from one of the oldest and most durable pigments of all time: carbon black. Made from ash mixed with a binder such as water, liquid or glue, various recipes for carbon black can be found as far back in history as the ancient Egyptians and Greeks.
Are iron gall inks waterproof?
What is the chemical formula for ink?
Ink Blue | C37H29N3O9S3 – PubChem.
What are the three components of ink?
Essentially, the key ingredients to an ink are pigments, resins and waxes and additives.
What is the binder in India ink?
resinous shellac binder
Modern liquid India ink has a resinous shellac binder and may also include dye-based colorants. Sold in bottles it can be applied with a nib pen or in washes with a brush. Once dry, India ink is opaque and indelible. Brown inks such as bister and sepia were made from wood tar and cuttlefish ink, respectively.
Iron gall ink. Iron gall ink (also known as common 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.
What are the chemical properties of ink?
In a litre of ink there must be at least 27 g of tannic acid and gallic acid, and at least 4 g of iron content. The maximum iron content is 6 g/L. After 14 days’ storage in a glass container the ink must not have stained the glass or show sedimentation. Eight-day-old writings, after washing with water and alcohol, must remain very dark.
What are the disadvantages of iron gall ink?
Iron gall ink is acidic. Depending on the writing surface being used iron gall ink can have unsightly “ghost writing” on the obverse face of the writing surface (most commonly parchment or paper). Ultimately it may eat holes through the surface it was on. This is accelerated by high temperature and humidity.
How much iron is in a litre of ink?
In a litre of ink there must be at least 27 g of tannic acid and gallic acid, and at least 4 g of iron content. The maximum iron content is 6 g/L.