| Job Title |
Lithographic Platemaker |
| Job Description |
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. 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.
Places Masking Paper On Areas Of Plate Not Covered By Positives
Or Negatives To Prevent Exposure Of Those Areas. Lowers Top Of
Vacuum Frame Onto Plate And Film Assembly And Activates Vacuum
To Maintain Contact Between Negative Or Positive Film And Plate.
Sets Timer To Activate Ultraviolet Light That Exposes Plate To
Positives Or Negatives. Removes Plate And Film Assembly From
Vacuum Frame And Places Exposed Plate In Automatic Processor To
Develop Image And Dry Plate. Performs Tests To Determine Time
Required For Exposure By Exposing Plates And Comparing Exposure
To Gray Scale (scale Used To Measure Tone Ranges). May Replenish
Chemical Solutions In Automatic Plate Processor To Maintain
Processor In Working Order. May Expose Plates, Using
Step-and-repeat Machines. May Make Proofs.
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