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Record number: 1, Textual support number: 1 CONT

Moisture can influence the behavior of the wood substrate so that deterioration of the paint film is increased. Springwood and summerwood are of different densities and porosities, and moisture enters springwood more readily and to a greater extent than it enters summerwood. This difference gives rise to a differential swelling, called "grain raising" or "grain swelling", that puts undue localized mechanical strains on coatings that are applied to the wood.  2, fiche 1, Anglais, - grain%20raising

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