A dot matrix is an impact printer. A scanner is not a
printer.
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how do you erase dot matrix print form paper
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A basic dot matrix has 9 pins, which produces an average print.
A dot matrix with 24 pins (or more) will produce a better quality
print.
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dot-matrix
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For the most part Dot-Matrix Printers are obsolete due to the
poor quality of the copy, although some commercial companies, and
organizations may use a dot-matrix to create carbon copies.