On your dried screen, you can see bubbles of emulsion on your mesh.
2. Possible origins
Your emulsion layer is too thick.
Two possible origins:
You didn't remove the black rubber parts of your scoop coater (which are only there to protect it during transport).
You need to practice the coating movement a little more.
3. Solution
If you didn't expose your screen yet, just clean it with water and a sponge. If you already hardened the emulsion, you need to reclaim it before using your screen again.
