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Surface of photopolymer printing plate

Surface of photopolymer printing plate

A850/0075

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY

Caption

False-colour scanning electron micrograph of the surface of a 'Flexigraph' photopolymer printing plate. Plates of this kind are used in letterpress printing. The thin metal plate is pre-coated with the photopolymer, and is exposed to ultraviolet light through a negative. Areas exposed to the UV light become hardened, whilst unexposed areas can be etched away chemically. The plate may then be wrapped around the printing drum. The tiny raised dots are coated with ink by a roller. The plate is then pressed against the paper, transferring the image. Magnification: x100 at 6x4.5cm size.

Release details

Model release not required. Property release not required.

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