Leather buyers
have become very wary of late and do not purchase large quantities
before an analysis is made of a fair sample.
One more word before I close. The governments and private individuals
in Europe cultivate and raise trees for both lumber and bark purposes.
The forests are excellently cared for by efficient foresters, and the
result is that the tanners obtain much cleaner and better bark, and of
a very even quality. Would it not be a good idea if some individual,
who would certainly earn the everlasting gratefulness of the tanners,
would look into this matter, and see that not only the lumber side of
our forest cultivation is not neglected, but that the bark also is
preserved and cared for? Of course, we can obtain all the bark
necessary at present and for some time to come, but the time will come
when we shall certainly regret not having taken these steps, if the
lumbermen and bark peelers go on devastating magnificent forests.
Below will be found a table of weight results. Sole leather tanned
with these materials gives for every 100 lb. green hide the following
quantities of finished leather:
lb.
Oak bark 48 to 54
" extract 55 to 56
Pine bark 44 to 46
" extract 48 to 50
Willow 45 to 46
Birch bark and oak extract 49 to 51
Quebracho wood and extract 48 to 49
Valonia 52 to 56
Knoppern 51 to 53
Myrabolams 50
Knoppern, myrabolams and valonia 52 to 53
Hemlock 55
Specification of tanning materials used in different countries:
_France_.
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