Assertion: lignin's effect | /r/HasProperty | claimed with maximum brightness stability
Facets:
value: at ph
type: OTHER
value: for unbleached groundwood pulp
type: PURPOSE
Source sentences:
text: Effects of pH on the extent of light-induced yellowing have also been claimed (Lewis et al. 1945) with maximum brightness stability at pH 3.0 to 4.5 for unbleached groundwood pulp.