| 摘要 |
Method for application of metric or inch grid on stable drawing foils characterised in that a metric or inch grid is engraved in an engraving, ultraviolet and blue-violet irradiation resistant layer, placed on a polyester background and thus prepared master is then copied onto a photographic halogen silver film producing a multiple-use positive matrix, which is next contact-copied on a stable, covered with a light-sensitive diazotype material, drawing foil and after exposure and developing in ammonia steam a precise grid imaging on the drawing foil is obtained.
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