TEST METHODS FOR CONSTITUENT CONTENT OF COMPOSITE MATERIALS
These test methods determine the constituent content of composite materials by one of two approaches. Method I
physically removes the matrix by digestion or ignition by one of seven procedures, leaving the reinforcement essentially
unaffected and thus allowing calculation of reinforcement or matrix content (by weight or volume) as well as percent void
volume. Method II, applicable only to laminate materials of known fiber areal weight, calculates reinforcement or matrix
content (by weight or volume) based on the measured thickness of the laminate. Method II is not applicable to the
measurement of void volume.
