Plastic 'Photon' card.

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  • After the demise of Letterpress the printing industry tended to change to Lithography in most cases. So from movable lead type one of the first introductions to photocomposition was 7-level punch tape and one of the companies who produced that was Photon. The picture in the archive shows the gauge the company produced to help the operator read the 7-level tape. The tape was then fed into a phototypesetting machine, producing bromide (photographic paper), The keyboard operator became very proficient and could read the perforated tape which included both data and coding.

    By Peter Copperwheat (01/06/2018)

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