Using Riso Screens with a Onglaze Ceramic Enamel Screening Medium
Riso screens have traditionally been used in enamelling with ground enamels which are gently pushed through the screen by pulling a plastic card across the screen. During this process only the smaller enamel particles pass through the screen (the particles must be small enough to fit through the mesh holes in the screen), whilst the larger enamel particles are returned to the pot. Images produced using this technique are generally light as a limited quantity of enamel has passed through the screen and landed on the blank surface, and as the enamel falls onto the blank surface it spreads giving a soft/diffuse quality to the image. In glass art silk screens are used in a similar way with ground pigments to add images to glasswork. In addition, the silk screens are often used with screening pigments (ceramic pigments in a screening medium) in an adaptation of the traditional screen printing process. The resultant images are bold, sharp and clear. With this in mind an enamel screening medium was made that could be used with Riso Screens to give bold, sharp and clear images.
Black screening medium image on steel (Elgin Cathedral).