Varnishing film and method of adjusting the surface gloss of prepress color proof using the same

A varnishing film in the method of adjusting the surface gloss of prepress color proof to obtain an image with surface gloss adjusted through the treatments of:

• 1) a step of forming an image on a photosensitive layer of varnishing film with the photosensitive layer layered via an adhesive transparent resin layer on a transparent supporter through imagingwise light-exposure and development,
• 2) a step of transferring the image of varnishing film after said step 1) onto an image-receiving sheet with the adhesive transparent resin layer provided on a supporter, together with adhesive transparent resin layer under heat and pressure, and peeling off the transparent supporter thereof,
• 3) a step of forming a color image on a photosensitive layer by imagingwise exposing to light and developing a photosensitive transfer sheet with an adhesive transparent resin layer peelable off from transparent supporter and the photosensitive layer containing coloring agent layered on other transparent supporter,
• 4) a step of superposing the surface of photosensitive layer of photosensitive transfer sheet after the step 3) on the surface of adhesive transparent resin layer of image-receiving sheet having transferred the image formed on the photosensitive layer of said varnishing film, transferring under heat and pressure, and then peeling off the transparent supporter,
• 5) a step of repeating imagingwise light-exposure, development, transfer and peeling-off of transparent supporter by the number of colors required, similarly, with other photosensitive transfer sheets with photosensitive layers containing coloring agents different in color tones, similarly to the step 4) aforementioned, and
• 6) a step of superposing the transferred surface of said image-receiving sheet on a final supporter, transferring the image under heat and pressure, and then peeling off the imagereceiving sheet, the improvements comprising the adhesive transparent resin layer of said varnishing film being peelable off from the transparent supporter and the photosensitive layer of said varnishing film containing transparent matting agent, thereby, causing the image having been formed on the photosensitive layer of varnishing film to provide a low-gloss image on the top surface of final supporter.