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Ball-grained Aluminium Lithographic plates
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These plates of aluminum are grained in the traditional way, i.e. with a graining machine in which the grains are inserted into the plate with hard grinding powder and balls. The grain created by this is "sharper" than a grain electrochemically applied or the grain of an offset plate. The grain size is "medium". Packaging: These plates are supplied per two pieces, the grained sides facing each other and separated by a sheet of paper. This is to protect the sensitive surface. |
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