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A step in preparing the printing plate:
tarnish is removed from the plate with
dilute acid
Aquatint particles are distributed on the
plate with a wind vane |
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 HE FIRST STEP in making a photogravure print is preparing the printing plate. This pure copper plate must be thoroughly cleaned, its surface highly polished, and its edges beveled (to avoid damaging the paper during printing). Next it is evenly dusted or sprayed with an acid resist of rosin or asphaltum, and heated to make the resist adhere. This procedure is identical to that of aquatint print-making, so early photogravures were sometimes called photo-aquatints. The aquatint preserves approximately 50% of the plate surface and creates a web of high points surrounding each cell.
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