Drukplaat Heer Bommel en de zwelbast [3232] 

• 1957 
• 3232 
• Cliché Heer Bommel en de zwelbast 
• Drukplaat 

cliché / printing plate day strip "Heer Bommel en de swelbast", episode 3232. From the first publication of the adventures of Tom Poes and Heer Bommel in De Telegraaf (1941) until the mid-1970s, the cliché (the metal printing plate) was used for printing the daily comic. Explanation: a negative was made of a Tom Poes drawing. This negative was placed on a sheet of metal on which a photosensitive layer was applied. By exposing the negative, the light-sensitive layer hardens in those places where the negative is transparent; where the negative is black, the layer remains soft. The plate was dipped in an acid bath. The acid eats away those parts of the metal sheet on which there is no cured layer. As a result, these parts of the metal sheet become lower; they don't print because they don't get inked. The high parts remain intact and print. A "Tom Poes cliché" is such an original metal printing plate on which the drawn Tom Poes drawing was applied as a negative image (i.e. a mirror image), after which this printing plate was used to print the drawing.

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