Plate-making method and apparatus for stencil sheet

摘要

A stencil sheet having a solvent-soluble resin layer is made by a plate-making apparatus, which is formed of a holding and moving device to hold and move the stencil sheet, a solvent supply device for supplying a solvent to the stencil sheet, and a control device. The solvent supply device is disposed at a predetermined distance away from the stencil sheet held by the holding and moving device and is moved with respect to the stencil sheet at least one of a horizontal scanning direction and a vertical scanning direction intersecting with each other. The control device obtains image signals of an image to be produced on the stencil sheet and controls the solvent supply device so that an amount of the solvent to be fed to the stencil sheet by the solvent supply device is changed based on the image signals to thereby perforate holes in the stencil sheet. The sizes of the holes perforated by the solvent is changed by the amount thereof to alter gradation of the image.