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A colorless crystalline compound, C7H 6o 5, derived from tannin and used as a tanning agent, as an ink dye, and in photography and the manufacture of paper.

一种无色结晶酸，C7H 6o 5，从丹宁酸中提炼而得，用作鞣剂、墨水染剂及摄影和纸张制造。

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So it is widely applied to pressure-sensitive adhesive, hot-melt adhesive, traffic paint, viscosity increaser for rubber, printing ink, hydrophobic agent for paper etc.

因此，被广泛应用于压敏胶粘剂、热熔性胶粘剂、交通路标漆、橡胶增粘剂、涂料、印刷油墨、纸张的疏水剂等。

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And because the company uses capsules rather than beads, it can mix them with a binding agent and print its electronic ink on to almost any surface, just as though it were real ink.

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