WOOD PULP

for spruce type of fibre. Closely parallel, especially for chemical pulps, are
eastern hemlock (Tsuga canadensis] and western hemlock (Tsuga heterophylla),
very low in pitch, which is the main wood for the new industry on the west coast.
Pine has been taking a larger place by reason of its suitability for the alkaline
sulphate process, which dissolves the higher content of resins. 'Redwood5

[Nokia AktMlag
FIG. 12.—-FLOATING LOGS DOWN FROM THE FORBST
(Pinus sylvestris) in Northern Europe and jack pine (Pinus banksiana] in America
are so much like spruce in fibre characteristics that they are now the usual
raw material for the best grades of kraft pulp. The southern pines, long leaf
(Pinus pdustris), slash (Pinus caribaea), loblolly (Pinus toeda), and short leaf (Pinus
echinata), with coarser fibres and more difference between springwood and
sununerwood, have become very important for liner board and medium-grade
papers.