1. Insoluble or insoluble in foaming solution In order to break the foam, the defoamer should be concentrated on the foam film. For defoamers, they should be concentrated and concentrated in an...

With the large number of high-security documents such as checks, banknotes, passports, and credit cards being forged, industry has been looking for new technologies in the optical field that can...

If you want to add special effects for offset jobs during the printing process, you can use fluorescent inks in the four-color printing process. In this way, the printed images can emit brilliant...

China has been producing ink for a long time. The predecessor of ink was pine ink. China uses pine smoke, glue (mainly cowhide glue, which plays a role in bonding cigarette ash), and water to make...