Context: Besides the fibres, pulps may contain fillers such as chalk or china clay, which improve its characteristics for printing or writing. Additives for sizing purposes may be mixed with it and/or applied to the paper web later in the manufacturing process; the purpose of such sizing is to establish the correct level of surface absorbency to suit ink or paint.

Question: What type of clay improves the characteristics of the pulps used in papermaking?
Answer: china clay

Question: What is added for sizing purposes?
Answer: Additives

Question: What besides china clay is used as a filler?
Answer: chalk

Question: Pulps only contain fibers and never what?
Answer: Unanswerable

Question: What are chalk, china clay and pulp an example of?
Answer: Unanswerable

Question: When are additives for pulp purposes mixed?
Answer: Unanswerable

Question: What purposes does sizing the filler serve?
Answer: Unanswerable

Question: What type of clay damages the characteristics of the pulps used in papermaking?
Answer: Unanswerable

Question:  What besides china clay is not used as a filler?
Answer: Unanswerable