Their function is to eliminate the unwanted printing parts from the positive offset plate surface, after exposure and development. The positive deletion pens are produced with [...]
Their function is to eliminate the unwanted printing parts from the positive offset plate surface, after exposure and development. The positive deletion pens are produced with the [...]
High density covering red pens for the masking of photographic films. The deep red ink completely absorbs the wavelengths included in the spectrum sensitivity of the printing [...]