Alum spots
Revision as of 05:57, 24 July 2013 by (username removed)
Description
Embedded crystals of alum from incompletely dissolved solutions used during sizing. Alum is acidic and can produce physical defects such as holes and powdery regions in the final product.
Authority
- E.J.LaBarre, Dictionary and Encyclopedia of Paper and Paper-making, Swets & Zeitlinger, Amsterdam, 1969