What function does a Sheraton Roll have on the paper machine (forming section)?

What is the function of a dandy roll? (Not all machines have one.)

Very Small amounts of blue dye afe often added to paper to

“Retention” on the papermachine can specify 

Clay is one of the most common fillers used in papermaking. Name one of its advantages and two of its disadvantages.

What is the “Zeta potential”

Why is calcium carbonate (a filler) only used in alkaline papermaking processes?

What is the biggest disadvantage of using fillers in papermaking 

Complete the table below by filling in either increased or decreased to indicate the effect of multiple recycling on the indicated paper/paper machine qualities. Tensile strength a. Burst strength b. Fiber length c. Fines content d. Speed of drainage of paper machine e. Fiber stiffness f.

Cleaners are used in recycled fiber processing to separate out contaminants. As with virgin pulps, the separation process of the cleaners is mainly based on differences in density. For virgin fibers, the most common cleaner type is a forward cleaner (removing sand, etc.). In recycled fiber processes, you will find a lot of reverse and flow-through cleaners. Why is that? What are reverse and flow-through cleaners removing?