Is the color of photosensitive glue dark or light?

If the color is very crystal clear under the care of light, like amber, and the peach gum is the older the tree, the better. If it is a new chewing gum, the color is lighter and the color is darker.

There are mainly two different systems of photosensitive adhesive, one is diazo photosensitive adhesive, and the other is pre-sensitized photosensitive adhesive, such as SBQ photosensitive adhesive. Different systems need different methods to measure exposure time.

The biggest advantage of diazonium is to change the color of emulsion from light yellow to neutral yellow. Yellow comes from sensitizer. Once the diazo reaction is completed, the color disappears. Generally, before crosslinking is completed, obvious color differences can be seen between all levels of exposure.