Abstract
The Projectina Universal Comparison Projector is well known for the examination of documents. Where sufficient surface details cannot be seen under conventional lighting conditions, the half-silvered mirror accessory will give enhanced contrast and clear edged appearance to the object being studied. A cast of the indented surface can help to eliminate any background interference due to undesirable reflection resulting from surface printing or irregularies. In this paper, enhancement by the application of a casting technique together with the half-silvered mirror accessory of the Projectina Universal Comparison Projector is discussed.
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