Every evening, Wilmington daily commercial., 1922-09-18
De-Inking Old Newspapers

of tho printing ink BIZ use OF alkalies.
Such treatment Will not injurs ground
wood pulp and II the carbon black
could be completely washed out after
liberation satisfactory material
would be obtained. Unfortunately tho
fbres of the paper stock serve az a
very effective filter In enrneshing mo
particles OF carbcn and there are no
means Of washing In common use that
will permit their complete removal
without excessive losses OF pulp or
expenditures Of time, water and power
that are prohibitive. In fact a point
seems 10 be reached beyond which 80
In impossible 20 remove the remaining
traces OF ink. with bentOnlte. how
ever, we have a substance that VIII
pass through ordinary filters and
with It's enormous surface. on account
Of the extreme 1noness OF 80 particles.
WIN carry all the carbon black along
with s."
Best Supply From Wyoming.
Bentonite Is defined by the CooloVi-
cal Survey as "a transported. strait
fed. volcanic ash that has been altered
shortly after deposition" II is very
fine grained and has the property Of
swelling in contact with water n sew
eral times It's original volume Ike
any natural product different deposits
vary considerably and Mr.. Wells says
that the best supply that has come 20
his notice is found IN Wyoming.
THE possibilities Of q process for
the recovery Of old newspaper stock
are apparent 20 anyone familiar with
the paper industry" says Mr. Wells.
when the price paid for old paper
stimulated collection u ~ reported
| that about rs. 900 tons per month were
| collected in Chicago. % which 30 per
cent was news During the same
period Cleveland IL reported 20 have
handled $50 tons per day Of which
100 tons were news. In our lsrgs
metropolitan centers probably 2.50o
tons per day were collected which
would furnish a very considerable
portion OF our daily consumption %
1000 tons Of newsprlnt The source
Of this raw material Is furthermore az
the place Of consumption and the
saving in freight Is a very important
item. The color requirements q the
publishers at the present time ara
very severe and any process that does
not thoroughly remove Ink cannot be
successful While considerable Diff
Aculty was encountered in meeting
these requirements. in our trials ths
results obtained az the process has
! been finally worked cut seem 70 justify
our belief that they can be met"
The logical location for de-inkinr
plants, according 70 the experts. VII
> be in a number OF the large urbar
i eenters where the supply OF raw ma.
terial--old newspapers-is great and
mostly readily obtained with a mini
!, mum Of handling and hauling charges
= and where, in turn. the demand 20
= newsprint is greatest.
= The utilization OF the de-iniSinl
. process therefore Will not benefit ma
: terially existing paper mills which ar
. in most instances located near thei
g original sources Of pulp wood in some
what isolated and small communities
:, However, from a raw material stand
point, especially in It's forest depletion
{ phase, the wide application OF the de
: linking OF old newspapers has poten
y TALLY q very important bearing; on III
II forestry problem in America today.
u In the experiments conducted b
Mr.. Wells it was found that shere wa
Is only a loss Of from 10 10 per cent i
l. bulk That is TO say, 100 tons Of oil
l. newspapers would produce at least 9
l. tons of pulp with which to nanufac
10 ture new paper. Newspapers. saw
l. for the few that are preserved in file.
r are all waste after they are q day Q
III SO old. and accordingly il all the 7Oo
g. tons of newspr;nt used daily could b
OF made available for re-manufacturin
sy purposes it is obvious that the inroao
which the paper industry makes o
s. spruce forests might be reduced unit
Is, under reforestation work the suppl
lie would easily keep pace with the ds
an mand.