Arabic gum
Name：Arabic gum
CAS：9000-01-5
molecular formula：N/A
molecular weight：0
Quality standard: Compamy standard
Package: 25kg/bag
Stability：Stable. Incompatible with alcohols, oxidizing agents
Chemical Properties：white to yellow-white powder
Usage: Gum arabic is also used to protect and etch an image in lithographic processes. Ink tends to fill into white space on photosensitive aluminum plates if they do not receive a layer of gum. In lithography, the gum etch is used to etch the most subtle gray tones. Phosphoric acid is added in varying concentrations to the acacia gum to etch the darker tones up to dark blacks. Multiple layers of gum are used after the etching process to build up a protective barrier that ensures the ink does not fill into the whitespace of the image being printed.
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