SUNHAYATO Photosensitive Board Manufacturing Supplies NZ Photosensitive Board Test Chart

It can be used repeatedly, and the difficult appropriate exposure time can be easily determined.
You can easily determine the appropriate exposure time in three steps.
You can see at a glance overexposure, underexposure, and proper exposure. In addition, the degree of overexposure or underexposure is easy to understand, so you can easily increase or decrease the exposure time.
The test chart can be used repeatedly, so it is economical.
* The exposure test chart is for determining the exposure conditions. It has nothing to do with the degree of etching.
* The test chart is a consumable item. Each time it is used, it may be scratched or the concentration may change. We recommend that you replace it with a new one on a regular basis.