Tips from Altercos for coating screen with emulsion:
– A scoop coater should be clean and its edges free of dents and nicks. A smooth edge is best.
– Make sure the scoop coater is well filled. You don’t want to run out of emulsion halfway up the screen.
– Coat the substrate side of the screen first. Begin your coating pass at the bottom of the screen. Firmly support your screen as you press the edge of the scoop coater against the mesh. Move slowly up the screen and slow down to a stop near the top. Twist the scoop coater upwards and off of the mesh. Flip the screen quickly and repeat on the ink well side.
– Be sure your emulsion coated screens are fully dry. If there is any amount of moisture in the emulsion during exposure, it can be a problem for stencil making and the emulsion may not work properly.
– The more emulsion on the mesh means you will need more exposure time. Lower mesh counts naturally hold more emulsion while higher mesh counts hold less emulsion.