Alan Wilkes

Positive acting composition yielding pre-development high visibility image after radiation exposure comprising radiation sensitive diazo oxide and haloalkyl-s-triazine with novolak and dyestuff

Water developable lithographic printing plate having dual photosensitive layering

Aluminum substrates useful for lithographic printing plates

Aqueous alkali developable negative working lithographic printing plates

Method for making a negative working lithographic printing plate

Process for making photosensitive lithographic printing plates involving sequentially coating with potassium zirconium fluoride and sodium silicate

Lithographic printing plate and method of making same

Duplicating film mask with radiation absorbing benzophenone in processed positive-working radiation sensitive layer on transparent substrate

Method of making positive acting diazo lithographic printing plate

Method for producing lithographic printing plates