The Diazo Photo Emulsion and Sensitizer Set contains a 26 oz. bottle of Diazo Photo Emulsion and a 2 oz. bottle of Diazo Sensitizer. Speedball's Diazo Photo Emulsion & Sensitizer offer professional-grade results and remove the need for expensive equipment and darkrooms. For use with polyester screen fabrics, Speedball's Diazo Photo Emulsion & Sensitizer may be used with any water-soluble or solvent-based ink and can be easily removed with the Photo Emulsion Remover.