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Papermakers alum and rosin size are wet end ingredients that
characterize acid papermaking and the resulting paper or paperboard
will have a pH around 4 to 5 and will yellow and deteriorate over time.
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Alkaline papermaking is accomplished using AKD and ASA as sizing
agents. Some alum may be added as a detackifying agent for
hydrozolates of ASA and AKD. The formed sheet is buffered
to 7 to 8 pH using calcium carbonate as filler.
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Clay Coated News Board is a multiply paperboard made on a cylinder
board or on a folded Fourdrinier machine from recycled newsprint and
coated with a pigment coating consisting of kaolin clay and titanium
dioxide (TiO2) both of which have good hiding power.
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Code of Federal Regulations
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Coated Natural Kraft Registered Trade Mark of MeadWestvaco made
from Kraft pulp.
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A paper making machine invented by Nicolas Robert Louis in 1799
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Is provided by rosin size, AKD or ASA applied to the fiber in water
suspension in the wet end of the paper machine to impart
hydrophobicity to the fibers.
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Rosin is abietic acid usually fortified by reaction with malaeic
anhydride. Abietic acid can be obtained by wounding pine trees
(particularly pitch pines) and collecting the exuded sap; by extraction
of lighter wood stumps; and by acidulating sulphate pulping black
liquor soaps to produce tall oil which is fractionated to produce rosin,
fatty acids, and pitch.
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Solid Bleached Sulfate Paperboard made from bleached sulfate pulp. It
can be either uncoated, pigment coating, or polymer plastic coated.
The most common polymer plastic coating is poly ethylene.
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Unbleached wood pulp made from chipped hardwood or softwood
trees using a process invented in 1884 by Carl F. Dahl of Germany. A
variation of this process can produce a strong high yield unbleached
pulp termed “kraft” which is the German word for strength. Kraft pulps
are produced for use in making grocery bags, wrapping papers,
corrugated container liner board, and solid paperboard which may be
coated or uncoated. Sulfate pulps are usually produced for
subsequent bleaching while kraft pulps are not.
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Is provided by starch applied at a size press and /or wet stack to the
paper or paperboard sheet. Starch plugs the pores of the fibrous
structure of the paper or paperboard sheet and retards the
penetration of water into the sheet.
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Solid Unbleached Sulfate Registered Trade Mark of Graphics
Packaging Corporation
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