This is for a Case of 12 cans. AlbaChem Clear Screen is an aerosol spray designed to clear and open printing screens of dried inks and other dissolvable substances. The unique formula does not contain any water and will not soften emulsions. It is made for use on photographic stencils or water soluble hand-cut film only. Benefits: Instantly unclogs any screen. Use while still on press. Works on all types of ink, fresh or old. Great for spot clean ups. Leaves no film. Directions for use: It is not necessary to stop printing when using Clear Screen. After a squeegee pass, spray onto clogged area from adistance of 6 – 10 inches. Screen will open after 2 or 3 passes of the squeegee. Use extension tube to direct spray into hard to reach areas.