Jell Chemical Anco Gum Arabic MS 587
Gum Arabic is used with varried amounts of tannic and phosphoric acid to etch a lithographic image into plate or stone. Gum arabic can be used to protect the sensitized litho plate or stone from grease information. When buffed onto the surface of the litho image gum arabic preserves the image for future printing.
Jell Chemical Anco Gum Arabic MS 587Gum arabic and TAPEM etchant chemicals etch the grease information which composes the lithographic drawing.
After drawing work is completed with litho crayons and tusche, preparation for the first etch of the litho plate or stone begins. The application of french chalk talcum which helps the Gum arabic etchant lie closely to the grease content of the drawing information. Next gum arabic containing tannic and phosphoric acids or TAPEM is loosely buffed onto the litho plate or stones surface with shop towels or kim wipes causing the image area to accept printing ink. Non image areas accept water, applied with a sponge, which rejects ink during roll up with a leather roller and printing on a litho press.
Gum Arabic is used in lithography during in prereration for drawing with litho pencils or tusch wases to establish negative areas. Gum arabic is also used during the first and seconds etch as well as the image closing procedures. Gum Arabic is sold in 1 gallon jugs and 4 gallon cases.
Item# 3080Jell Chemical Anco Gum Arabic MS 587
14° Baume, 100% pure Gum Arabic.