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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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