Kimodens Spray The optical density of KIMOLEC laser film depends on the laser printer's toner technology. If a higher density is required, the simplest and cheapest method for occasional after treatment is Kimoto's Kimodens PF-DENS Spray. It contains a special agent that refines and homogenises the grain size of the toner. This increases the density value up to 3.5 Spray evenly on the exposed side of the Kimolec PF-90S film from a distance of 30-40cm.   The film is ready to be exposed after few minutes drying time.