This System 3 Removable Screen Block from Daler-Rowney is used over a screen drawing fluid to create beautiful hand drawn stencils that can be used to print with multiple times. Once the drawing fluid has dried, the whole screen surface is then blocked out with the System 3 Removable Screen Block which can be applied with a squeegee. Once that has dried, the image you drew before is to be washed out with cold water which then leaves behind an open-mesh positive image that is ready to be printed with. Once you\'ve finished printing, screens can be reclaimed by softening up the block with really hot water and soap solution, then using a brush intensely scrub out the System 3 Removable Screen Block to leave behind a clean screen ready to be used again. This screen block comes in a 250ml bottle and should be stored upright at normal room temperature, it is best used with printing mediums, acrylic colours and screen drawing fluids. - Brand: Daler-Rowney - Size: 250ml - Use over screen drawing fluid to create an open-mesh positive image on a screen - Wash out with hot water and soap to remove - Perfect for screen printing