Optically variable ink has the following technical features:

1，Color changing effect: With the change of the viewing angle, the color changes.

For example, when viewed head-on, it appears purple, and when viewed at an angle, it appears yellow-green; when viewed head-on, it appears blue, and when viewed at an angle, it appears green.

2，Lightfastness: Level 8.

3，Heat resistance: 160℃.

4，Water resistance: Level 5.

5，Acid resistance: Level 5.

6，Alkali resistance: Level 5.