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The Overlay System
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architect architectural areas base and overlay camera camera-projector unit changes Chapter client color complete composite computer-aided design contact printing coordination copyboard cost design development detail dimension overlay draftable matte surface drafter drafting board drafting room electrical emulsion equipment erasing Figure final drawing floor plan base format sheet framing grid full-size hand drafting hand production image line layout plan light microfilm moist-erasable needed negative photography offset printing opaque original tracing overlay sheets overlay system overlay technique overlay-register technique phase photographic photographic film photore photoreproduction pin bar pin graphics placed plan base sheet plotters plumbing polyester drafting film polyester film prepared prepunched sheet problems procedure project drawings reduction negative registration bar reprographic reverse-read scale schedules schematics scissors drafting scribe Shading films sheet of polyester sheets and overlays shop drawings side space structural engineer team members tion usually vellum wall sections whiteprinter