This can be caused by underexposure. When it comes time to reclaim, the stuff wants to stain in the screen. Haze paste should do it, I don't know what else works.
I use the haze when the situation dictates. Use gloves- but it will not eat your skin. It is nasty and extremely strong. I use a 2+2 coating method with the round side of the scoop coater to get a nice stencil thickness.
2+2 means 2 coats on the bottom of the screen, then turn the screen around and coat 2 times from the inside to push the emulsion through the mesh, so the emulsion ends up on the bottom of the mesh where it belongs.What do you mean 2+2. Do you mean two full coats. Coat both sides, let dry then coat again?
I was wondering what the rounded side of the coater is for.
To build up a thicker stencil, or smoother surface (Rz value), after the water evaporates and the initial coating takes on the shape of the mesh, you should face coat.Are you saying to coat the screens once, let dry then recoat them with the sharp side as a "face coat" ?