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Updated: June 17, 2025
By these methods the evidence first, the removal of the luster or mill-finish from the surface of the paper; second, the disturbance of the fibre of the paper, manifest under a microscope; third, if written over, the ink will run or spread more or less in the paper, presenting a heavier appearance, and the edges of the lines will be less sharply defined; fourth, if erasure is made on ruled paper, the base line will be broken or destroyed over the scraped or rubbed surface; fifth, the paper, since it has been more or less reduced in thickness where the erasure has been made, when held to the light will show more or less transparency.
When erasures have been made with acids, there is a removal of the gloss, or mill-finish; and there is also more or less discoloration of the paper, which will vary according to the kind of paper, ink, and acid used, and the skill with which it has been applied.
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