E.i. Dupont De Nemours and Company

Rajgopal Subramanian

Robert M Blomquist

Mark A Hackler

Adrian Lungu

Violeta Lungu

Violetta Lungu

The present invention relates to a photosensitive printing form precursor and a method for forming a printing form from the precursor. The precursor includes a support and a layer of a photosensitive composition adjacent the support, in which at least one indicia is disposed between the support and the photosensitive layer. The indicia identifies the precursor, is retained throughout a multi-step process to convert the precursor into a printing form and in the end-use of the printing form.

Printing form precursor having indicia and a method for preparing a printing form from the precursor

The invention pertains to a method for rebalancing a solvent solution useful for treating photosensitive printing elements having a photopolymerizable layer. The solvent solution becomes contaminated with unpolymerized material and other materials that release from the photosensitive printing elements during washout treating, and separation of contaminates also removes some of one or more components in the used solvent solution. The method rebalances the proportion of the components in a solvent solution having 3 or more components. The method includes measuring a reclaimant, which has been separated from the contaminates, for two or more properties, calculating a mass of the components to be added to the reclaimant based on an equation generated for each measured property, and adding the mass of the component or components to the reclaimant to adjust the proportion of the components in the reclaimant to targeted proportions.

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Robbinsville, NJ, United States of America

Rajgopal Subramanian