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    Plastic Molding and Casting Machine Operators and Tenders

    Produce printing plates by exposing sensitized metal sheets to special light through a photographic negative. May operate machines that process plates automatically.

    Mounts negative and plate in camera that exposes exposed plate to artificial light through photographic negative, thus transferring image. Examines unexposed photographic plate to detect flaws or foreign particles prior to printing pattern of aperture masks on sensitized steel. Performs tests to determine time required for exposure by exposing plates and compares exposure to scale which measures tone ranges. Places plate in vacuum frame to align positives or negatives with each other and places masking paper over uncovered areas. Punches holes in light-sensitive plate and inserts pins in holes to prepare plate for contact with positive or negative film. Repairs defective plates with missing dots, using photographic touch-up tool and ink. Installs and aligns plates in printing case. Examines plate, using light-box and microscope to detect flaws, verify conformity with master plate, and measure dot size and center. Mixes and applies chemical-based developing solution to plates and replenishes solution in processor to maintain it in working order. Transfers image from master plate to unexposed plate and immerses plate in developing solution to develop image on plate. Transfers images by hand and covers surface of plates with photosensitive chemical, using brush, and allows plate to dry. Lowers vacuum frame onto plate-film assembly to establish contact between positive-negative film and plate, and sets timer to expose plate. Removes plate-film assembly from vacuum frame and places exposed plate in automatic processor to develop image and dry plate.

    Chemistry -- Knowledge of the chemical composition, structure, and properties of substances and of the chemical processes and transformations that they undergo. This includes uses of chemicals and their interactions, danger signs, production techniques, and disposal methods. Production and Processing -- Knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of goods.

    Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance. Operation and Control -- Controlling operations of equipment or systems. Installation -- Installing equipment, machines, wiring, or programs to meet specifications. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly.

    Near Vision -- The ability to see details at close range (within a few feet of the observer). Arm-Hand Steadiness -- The ability to keep your hand and arm steady while moving your arm or while holding your arm and hand in one position. Information Ordering -- The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e.g., patterns of numbers, letters, words, pictures, mathematical operations).

    Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Identifying Objects, Actions, and Events -- Identifying information by categorizing, estimating, recognizing differences or similarities, and detecting changes in circumstances or events. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles).