The Daler Rowney System 3 Removeable Screen Block is for use with Printing medium, acrylic colours and Screen Drawing Fluid. 

Once the positive image drawn with Screen Drawing Fluid has fixed, Removable Screen Block is applied on the inside of the screen with a squeegee.

Again, once dry, the previously drawn image is washed out in cold water to leave an open-mesh positive image ready for printing. 

The screens can be reclaimed after printing by washing out the screen block with hot water and soap. Screen Block should be kept upright and stored at normal room temperature. 

Stencils can be removed with with abrasive household cleaner.