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Artools, leather rollers for Lithography.
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There are two main types of hand rollers to distribute the ink on the printing surface. A type with a leather cover usually used for printing with black ink. The other kind has a rubber coating, and is usually used for color printing. The difference between leather rolls and rubber rolls, etc., is that leather is porous. It absorbs fluid and releases it again. Distributing ink over a printing form can then lead to a better ink distribution. With litho there is always water present on the stone. A rubber is not able to absorb this water. The water will therefore partially emulsify with the ink, causing the quality of the ink to deteriorate rapidly. This problem is less of a problem with a leather roll because the water is partially absorbed by the leather and therefore does not emulsify with the ink. The leather rolls as supplied by the supplier cannot be used immediately, but must be prepared. |
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