Following up on Rein's (member of Stampboards) comments, I have the following comments:
1. The assumption that there is a Wavy Rays watermark and a Straight Rays watermark is questionable. I use these two references only to simplify the subject. In reality, most of the watermarked papers have a unique watermark. The exception is the watermark shared by the 1E1, 1E3, and 1L1 papers.
2. Even though I originally labeled the 1E and 1L papers to mean that the 1 referred to Wavy Rays, it is more reasonable to use the 1 as a category number, and not as a reference to the type of watermark. By this I mean that the 1E papers are in a category of 5 papers with 4 distinctly different watermarks, and the 1L papers are in a category with 5 papers each with a unique watermark.
3. The paper has three characteristics: (a) the consistency and color of the pulp, be it opaque, white, gray; (2) the watermark as defined by its dimensions; (3) the grid, when discernible, and the relative angles of the rows of dots or ellipses, when discernible.
4. The vertical and horizontal versions of some of the watermarks should be from rolls of paper that were manufactured differently. It may be determined in the future that the two types are two separate watermarks.
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