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Description: COATED PAPER - Generally packed in thick paper packets of one ream each inside wooden case. Although the cases and wrappers may arrive in seemingly perfect condition, the contents may be damaged. On occasion the edges of the sheets may be found to be adhering so resolutely as to be almost inseparable. The surfaces of the sheets (face and back) will neither be stuck, blemished nor marred, thus eliminating the possibility of the damage having been caused by moisture or pressure. Therefore, it is an outside factor which causes the edges of the sheets to cleave in this fashion (and not some natural or innate tendency of the paper which causes the edges of the sheets to cluster and stick together) it can only be presumed that the proximate cause must be heat, to which cellophane is susceptible. If packed in cases the risk of outside damage is small; the so-called case bales are not always satisfactory. Frequently with coated papers the sheets are found gummed together. This is sometimes caused by the paper having been packed slightly damp. Such dampness may also lead to crinkling of the sheets. VISCOSE FILM - Is naturally hygroscopic and therefore affected by climatic changes. It absorbs moisture and dries out quickly. Extreme conditions of heat, cold, moisture or dryness should therefore be avoided both in stowage, and storage. In humid weather it is not advisable to stack or stow the packets of sheets too high, as this will cause the sheets to adhere to each other. On arrival at destination, should difficulty be experienced with sheets not separating freely, the surveyor should try flexing the package. This often separates the bond, which sometimes is caused by a vacuum resulting from complete expulsion of air between the sheets.
Index: 740

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