Formation improvement
1. Reduce headbox consistency if drainage capacity of forming table permits. 2. If other aspects of paper quality allow it: (a) change furnish to one of shorter fibers. — for coating rawstock or offset bond use more hardwood. — for groundwood papers, lower the groundwood freeness and/or increase amount of groundwood. (b) where appropriate, refine […]
Refining and paper problems
1. When ash test is low, improve filler retention by closing up the sheet with more refining. 2. Blowing on the Yankee is probably due to inadequate adhesion that can be helped by increased refining. 3. Sticking to the Yankee reflects a structure that is too tight and probably has too many fines. — both […]