When the replacementof poly-acrylic acid size to PVA was less than 25%, the sized warp yarn mettherequirementsof weaving and the coatedandinfiltrationpropertyofthesized yarn was good.
If this is all Greek to you, well, lemme give you a brief explanation: Space Hulks are, essentially, planet-sized space crafts, comprised of multiple ships which were, most often, lost in the Warp or captured by aliens or Chaos forces.