PSG is a combination of solvents to remove ink from the plate, micro-filtered Gum Arabic to protect and leave the non-image area of the water receptive and Asphaltum to protect the image area and maintain ink receptivity. Asphaltum is one of the best ingredients to guarantee that the image will stay ink receptive andprotected. The large amounts of gum arabic and asphaltum contained in the product assure the printer of a quick and clean start up after the plate is taken out of storage and washed off for use again.