LITHOGRAPHIC SUPPLY PRODUCTS-NAMELY, AN ALBUMEN PLATE COATING OR ALBUMEN IN SOLUTION, USED FOR COATING LITHOGRAPHIC SURFACE PLATES AND DEEP ETCHED PLATES; A PREPARATION FOR SENSITIZING THE ALBUMUN IN COATING SOLUTIONS OR SIMILAR PREPARATIONS, FOR RENDERING SAME LIGHT SENSITIVE IN A PHOTOGRAPHIC SENSE; A SOLUTION USED TO DESENSITIZE PLATES, HAVING THE PROPERTY OF REDUCING AFFINITY FOR GREASE; DEEP ETCH PRODUCTS, COMPRISING SENSITIZERS, DEVELOPERS AND ETCHING SOLUTIONS USED IN CARRYING OUT THE ACCEPTED STEPS IN THE PROCESS OF MAKING A DEEP ETCHED PLATE USED FOR PRINTING AND/OR LITHOGRAPHY; A MIXTURE COMPRISING SULPHUR AND SOAPSTONE USED FOR DUSTING AND DRYING BLANKETS USED IN PRINTING AND LITHOGRAPHY