SURFACE WAX ON WAXED PAPER OR PAPERBOARD: ASTM D2423
EXPLANATION
Many of the fundamental properties of waxed paper and paperboard are related to the amount of wax present as a surface film. Test methods which determine wax load by solvent extraction do not differentiate between the wax present as the surface wax layer and that which has penetrated into the substrate. This test method, which mechanically removes the wax, measures the amount on each surface of the substrate.
TEST SUMMARY
The quantity of wax present as a surface film on paper or paperboard is determined through the difference in weight of specimens before and after scraping with a razor blade.
TEST PRECISION
Repeatability: 0.976 g/m2 (0.6 lb/ream)
Reproducibility: 1.46 g/m2 (0.9 lb/ream)
This procedure has no bias because the surface wax on waxed paper or paperboard can be defined only in terms of this test method.
