Patent ID: 6732864
Filing Date: 2004-05-11
Classification: B41C

Abstract:
A packaging structure for planographic printing plates, the structure comprising:a plurality of planographic printing plates, each planographic printing plate including an image forming surface having a strength equal to or greater than 490 Pa when measured by a method for measuring strength of an image forming surface of a planographic printing plate, the method comprising the steps of: contacting the image forming surface to be measured of the planographic plate with a member that is comparable to a predetermined member that will contact the image forming surface of the planographic printing plate when disposed in a packaged state, sliding at least one of the planographic printing plate including the image forming surface to be measured and the member relative to each other and in a direction along the image forming surface while a predetermined load is applied to the planographic printing plate and the member in a direction substantially orthogonal to the image forming surface, observing the planographic printing plate for damage to the image forming surface being measured, and determining a strength of the image forming surface of the planographic printing plate based on a maximum value of pressure that does not generate damage when applied to the image forming surface; a stacked sheaf comprising protective members contacting the image forming surfaces for protecting the image forming surfaces of the planographic printing plates, the protective members and the planographic printing plates being alternately stacked; and a packaging member for storing and packaging the stacked sheaf.