If your laser printer doesn't print dark enough for quality positives, try lightly spraying your Laser Printer Film with Casey's Ultra Black Toner Enhancement Spray after printing in order to darken the laser printer output.
This toner enhancement spray will dissolve the toner and cause the toner particles to fuse together, making the black toner more opaque. Casey's Ultra Black Toner Enhancement Spray is virtually invisible, leaves no residue, and only affects the toner areas.
Shipping Note: Casey's Ultra Black is an aerosol product and cannot ship Air (must be shipped Ground). Casey's Ultra Black is prohibited for export and cannot ship outside the contiguous United States. We apologize for any inconvenience.