optical character recognition ink (OCR ink) 用反射率极低的颜料如炭黑制成的油墨，其印件对光学扫描阅读机能表现出一定的反射对比度，可藉此对所印的数据字符用光学扫描阅读机加以判读。
安全油墨;保险油墨;防伪油墨;隐显油墨;感应油墨;safety printing ink 网孔版油墨;丝印油墨;丝网印刷油墨;丝网版油墨;滤过版油墨;screen printing in……
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如安全油墨、亮光油墨、光敏油墨、透明油墨、静电油墨等。
Such as security printing ink, light ink, photosensitive ink, transparent printing ink, electrostatic printing ink, etc.
刮奖专家以印好的编码作为标记，并在上面覆盖一层可以挂掉的特殊涂层（可以使用热变色油墨或其他安全油墨）。
The scratch-and-win specialist marks the keys with printed codes and covers them with a special scratch-off layer (thermochromatic or other security inks could be used).
新型印刷油墨清洗剂选用了一种新型溶剂，其清洗效果好，使用安全，气味轻。
This printing ink cleaner selected a new solvent. It was proved that the cleaner has high efficiency, safety and light smell.
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