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Job Description:

  • 1) Exposes sensitized metal plate to positive or negative film, using vacuum frame, to produce offset lithographic printing plates: Punches holes in light-sensitive plate with register punch and inserts register pins in holes to prepare plate for contact with positive or negative film.

  • 2) Places plate on bed of vacuum frame and inserts positives or negatives on register pins to align positives or negatives with each other and with plate.

  • 3) Places masking paper on areas of plate not covered by positives or negatives to prevent exposure of those areas.

  • 4) Lowers top of vacuum frame onto plate and film assembly and activates vacuum to maintain contact between negative or positive film and plate.

  • 5) Sets timer to activate ultraviolet light that exposes plate to positives or negatives.

  • 6) Removes plate and film assembly from vacuum frame and places exposed plate in automatic processor to develop image and dry plate.

  • 7) Performs tests to determine time required for exposure by exposing plates and comparing exposure to gray scale.

  • 8) May replenish chemical solutions in automatic plate processor to maintain processor in working order.

  • 9) May expose plates, using step-and-repeat machines.

  • 10) May make proofs.




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End Of Job Description for: "LITHOGRAPHIC PLATEMAKER"
DOT:   972.381-010

Job Number: 5968