Leading you to an educated decision.

ASTM D 570
A test method that measures the relative rate of absorption of plastic that has been immersed in water. This type of testing applies to all plastics, including resinous plastics that have been hot-molded, cold-molded or cast, as well as laminated and homogeneous plastics in rod, tube or sheet form in thickenesses of 0.13mm or greater.