The Roll Vac 4500 vacuum frame printer represents the first major technical breakthrough in decades. It has several key advantages over convention methods of contact printing. One of these is the automatic exposure control, which adjusts to compensate varying densities and multi-layers of drafting files.
Various materials are available for reproduction on this printer, which gives a high quality print every time and ensures fast turnaround time. Another outstanding feature is the powerful, metal halide lamp, which emits ultra-violet light for fast, uniform exposures.
Economy Photo Mylar is 4-mil, polyester, archival material made from an original. It is an intermediate, translucent material with either a clear film or single matte surface. The image is easily removed, resulting in little or no background so that erasures will not shadow on Blueline copy. Drawings reproduced on Economy Photo Mylar will not fade, yellow, or smear. They are optically clear without the shadows, textures, and cloudiness like some Diazo films. Economy Photo Mylar accepts pencil and ink drafting and holds excellent scale.