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光变油墨光变油墨又称光学变色油墨
光变油墨又称光学变色油墨和变色龙油墨印品色块呈现一对颜色，例如：红—绿、绿—蓝、金—银等。在白光下正看或侧视，随着人眼视角的改变，呈现两种不同的颜色，光变特性强，色差变化大，特征明显，不需要任何仪器设备都可以识别，其颜色角度效应无法用任何高清晰度的扫描仪、彩色复印机及其它设备复制，印刷特征用任何其他油墨和印刷方式都无法效仿，防伪可靠性极强，所以被世界上多个国家指定用于要求最严、难度最大的货币和有价证券的防伪上，国内一些著名的厂家也已用于包装防伪。 |
| 品名 |
光学变色油墨-变色龙油墨-光变油墨-光变粉 |
| 颜色品种 |
干涉型：银—绿、红—绿、紫红—绿、棕红—金、洋红—金、玫红—金、黄绿—蓝、翠绿—蓝、草绿—紫、蓝—紫红、青—紫、金—银
云母型：金—绿、红—绿、绿—蓝、蓝—紫黑、蓝绿—紫
液晶型：紫—绿、绿—紫、绿—橙、无—金、红、绿、蓝 |
| 印刷方式 |
丝印、凹印 |
| 添加剂 |
1、丝印：按干燥要求使用719快干、783慢干、800特慢干等溶剂；
2、凹印：丁酯、乙酯、异丙醇等溶剂。 |
| 注意事项 |
1、干涉型：具有金属质感，有色，遮盖力没有普通颜料好，可以丝印、凹
印，如丝印建议用200目丝网印刷。建议先印黑的底色，如不印黑色底色要采用高浓度的油墨。
2、云母型：乳白色，可以丝印、凹印，必须要印深色底，如深红、深蓝、黑色，黑色效果最好，如丝印建议用150目丝网印刷。
3、液晶型：乳白色，可以丝印、凹印，双变色要印深色底，如深红、深蓝、黑色，黑色效果最好；单变色印白色底。如丝印建议用200目丝网印刷。
4、印在光滑不透光的底材上光变效果更好。 |
Optical variable ink is the most complicated intervention-type anti-forgery ink. The printing products using this ink has colorful metal luster in which color lump shows a pair of colors, red-green, green-blue and golden-silver, for example. Seen from the front or lateral side under sunlight, the ink glows two different colors varying with the viewing angle, characterized by intense optical variation and sharp color changes, whose color angular effect can’t be duplicated by high resolution scanner, color copying machine and other devices, and printing features can't be emulated by any other printing inks and printing types. With the unique design and special charm, it has become the rarely excellent anti-forgery ink and is recognizable without any devices. Furthermore, due to its complicated ink production process, huge investment, high anti-forgery reliability and involving high-technology in fields such as machinery, optics, electron, vacuum, superfine grinding, surface chemistry and high molecular material, it is applied in strictest and most difficult anti-forgery in currency and securities by many countries and in packing anti-forgery by some famous manufacturers. |
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防伪油墨 
