Gum up to apply gum Arabic or similar solution to a lithographic surface to protect it from oxidation and grease.
在柯式印版上涂上一层阿拉伯胶或类似的胶体以防止氧化或沾染油脂。
Cellulose gum: a water soluble gum derived from wood fibre cellulose, used as a substitute for lithographic gum Arabic and synthetic gums.
纤维素胶：由木纤维获得的纤维素胶；可溶于水，用来代替阿拉伯胶或合成胶。
Gum Arabic: a colloidal substance, obtained from certain varieties of the acacia tree found in the Middle East. See Arabic gum.
阿拉伯胶从中东某几种阿拉伯橡胶树所得的胶质。参阅上文。
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