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Core Skill F

Key materials used on press - Introductino to Flexo Plates

QuestionAnswer
What is plate distortion? It is the compensation for plate elongation that occurs when wrapping a plate around a cylinder.
Caliper Total thickness of the plate
Floor Non-printable area of plate
Image area Printable surface of the plate
Shoulder Support for the printable area
Plate backing Material that is on the back of the plate to provide stability
Relief The distance between the floor and the top of the image
What was the first type of printing plate used? Hand Engraved Rubber
What are the five basic steps to making a photopolymer plate and the purpose behind each of them? 1. Back exposure to harden the floor and establish the relief depth 2. Face exposure through negative to harden the relief printing area 3. Washout to remove unexposed photopolymer 4. Drying to remove absorbed water or solvent 5. Post Expose and Detack
What two configurations are rubber plates available in? Molded and laser engraved
Photopolymer materials are available in two forms, what are they? Liquid and Sheet
Ozone is an omnipresent gas that is created by the interaction of UV light and oxygen and can be harmful to photopolymer plates? What defect occurs from ozone attack? Fine cracks in the surface of the plate
Flexo film for plate making is available in two thicknesses, what are they and which one is recommended? .004 and .007, however .007 is desirable as it is easier to handle and store without kinking
What is meant by capped plates? The cap layer is slightly harder photopolymer material than the base layer and does not distort under impression as an uncapped plate does.
What is the answer to What makes a good printing plate? Prepress is very criticall, garbage in garbage out, artwork must be correctly compensated, plate caliper, and of course plate storage.
Created by: bhsgraphics