ASTM D3521 Standard Test Method for Surface Wax Coating On Corrugated Board
4. Summary of Test Method
4.1 The amount of wax present as a coating on the surface is determined by delaminating the coated facing to obtain a ripple-free sheet, then scraping off the wax using a razor blade and calculating the wax removed.
5. Significance and Use
5.1 Wax coatings are applied to corrugated board to provide a better barrier against moisture or other agents or to provide improved appearance or abrasion resistance. These performance features are influenced by the amount of wax present on the surface.
5.2 During most coating operations, the major portion of the wax applied will congeal on the surface, while a minor proportion will migrate into and become embedded in the fibers of the facing. This method measures only the portion on the surface.
