Production of patterned paper

摘要

Speckle-patterned paper is produced on the paper machine without the use of printing techniques by first preparing speckle-forming material and then introducing this into a contrasting colour papermaking furnish. Paper is then made from the speckle-containing furnish in the normal way. The speckle-forming material is produced by dry comminution of cellulose fibre aggregates in the form of paper or entangled fibre clumps.