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back to top COTTON FIBER: Cotton is one of the strongest and most durable natural fibers known to man.Papers manufactured from cotton fiber will last longer and hold up better under repeated handling and various environmental conditions than paper made from wood pulp.
Papers that are “acid free” will resist yellowing and disintegration longer than sheets that are not acid free.
This is particularly true as the percent of wood pulp in paper relative to the amount of cotton increases, since cotton fiber papers are less likely to disintegrate or yellow than papers made with all or part wood pulp.
Of all wood pulp papers, only paper made of #1 sulphite is considered a “fine” paper and can be identified with a watermark.
back to top ACID FREE FORMULATION: Paper which has no acid or residual acid-producing chemicals is called “acid free”.
This is done by incorporating a special marker into the watermark.
The position of the mark is usually changed annually and legal records are kept documenting the date and its exact location.back to top GRADE: Fine papers are differentiated from each other by their grade.Different grades are distinguished from each other on the basis of their content, appearance, manufacturing history, and/or their end use.back to top WATERMARK: The watermark is a sign of quality.It assures the user that the paper is a fine paper.A watermark may be centered or localized on each sheet, or more commonly it is a random mark.A random mark may be centered, but most often will appear in various positions from sheet to sheet.The very best grade of sulphite is known as a #1 sulphite.Southworth uses only #1 sulphite in the manufacturer of its fine business paper.back to top RAG: The term “rag” is often used interchangeably with “cotton fiber content” and harkens to a period of time when paper was actually made using cotton rags.These rags were cleaned and then broken down into fibers, which were then used to manufacture paper.