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27.12.22

Preparation of Blue Ink.

Scientific American 25, 17.12.1864 Prussian blue dissolves in oxalic acid, giving a dark blue limpid liquid. This interesting discovery of...

3.6.14

Chrome Green.

Manufacturer and builder 7, 1869 Oxides of chrome are prepared either in the they or wet way; obtained thus, they vary from greenish gray to...

7.5.10

Aniline Gray.

Manufacturer and builder, 6/1869 THE following recipe has been published by M. Bloch, to produce an aniline gray color: - 1 kilo. of anilin...

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