This is samples of the types of paper used with this plotter. The bottom is 20 divisions/inch. The 1" line and 1/2" lines are slightly heavier. The 1/2" line is subtle and the difference can just be seen in the large size picture. The next one up is 10 divisions/CM. This and the top paper were from Europe. The top two are plain paper. The edges with the holes are perforated so they can be removed after the plot is finished. Modern roll plotter paper doesn't have pinfeed holes. More information with the next picture.
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