Iron Gall Ink Color. Download scientific diagram | Sample sheet for basic tests. Upon add

Download scientific diagram | Sample sheet for basic tests. Upon addition of the iron(II) sulfate to cup 2, a dark color appears – the additional iron makes the reaction produce more of the iron gall ink Step D. It was used across Europe until at least the nineteenth century and vast numbers of medieval and renaissance manuscripts were written with it. When exposed to oxygen a ferric tannate pigment is formed. It has a color of blue-black when freshly made and become rusty brown when degraded. Jan 1, 2003 · Materials such as inks and parchment interact with different wavelengths of light in various ways, for example, iron-gall ink reflects infrared light whereas carbon-based ink absorbs it [18]. Scabiosa is a dark purple iron gall ink that in certain pens shades beautifully and, more importantly, is very water proof. Recipe: Iron Gall Ink Iron gall ink is light grey, it darkens significantly when dry. Because of its quality and durability - especially compared to the many brands of the same name on the market - it is especially recommended for authorities, offices, schools and homes. The primary active components in tannin are gallotannic and gallic acid.

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