Automatic Age

Issue: 1926 December

th e a u t o m a t ic a g e
v °l- 2
CHICAGO, DECEMBER, 1926
No. 5
TH E AM ERICAN CHEW ING G UM
INDUSTRY
ORIGIN AND EXTENT OF THE INDUSTRY.
Chewing Gum Ingredients.
Chicle.
Chicle is a resinous gum derived
from the milky latex of the Nispero
(Achras sapota,) an evergreen tree
"which grows abundantly in the warm,
damp forest of Southern Mexico, Yu­
catan, Central America, British Hon­
duras, and adjacent South American
countries. Some interesting authori­
tative information on the chicle in­
dustry has recently been published1
from which the botanical data and
the information on collection and
Preparation is quoted.
Although the bulk of the world’s
Supply of chicle comes from Mexico
and British Honduras, nearly all the
central and tropical South American
republics are chicle producers, several
pf the latter having come into prom­
inence only during the last few years.
While the true chicle is produced
by the Nispero tree, the chicle ex­
ploited in Colombia is derived from a
different source, as is probably also
that obtained in the neighboring re­
publics. The exact botanical origin
° f the Colombian chicle is a matter of
some doubt, but it appears to be a
species of Couma. This genus be­
longs to Apocynaceae, a family con­
taining many economic plants of im­
portance, including several rubber-
yielding trees and vines.
The botanical source of chicle in
the different South American coun­
tries is apparently not known, but it
js not improbable that the tree may
be a species of Couma, as the Co­
lombian chicle tree appears to be.
As compared with the Mexico chi­
cle, the Colombian contains more
resin and less gutta, namely, 83.2 per
cent resin and 5.5 per cent gutta in
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the wet material, as against 44.8 per
cent resin and 17.2 per cent gutta in
the Mexican material. The Colom­
bian product is therefore inferior to
the Mexican, and when used in the
manufacture of chewing gum, is
mixed with the latter.
According to the United States
Commerce Reports for June, 1920r
the total exports of chicle from Co­
lumbia for the year 1918 amounted to
690,496 pounds, about half of which
came from the Sogomoso river region
of the Magdalena Valley.
Collection and Preparation
The resiniferous latex from which
chicle is prepared occurs in the bark
of the tree, and is obtained by tapping
in much the same way as rubber or
balata. Incisions are made in the
bark, usually in V-shaped form, a
long knife known as a machete being
used for the purpose. The outfit of
a chicle collector, or chiclero, con­
sists of a machete, a rope for clinbing
the trees, and receptacles for collect­
ing the latex.
A series o f these V-shaped inci­
sions are made and usually connected
by a vertical channel, down which the
latex readily flows into receptacles
placed to receive it. Canvas bags
are preferred for this purpose because
they admit o f baling in large num­
bers, thus occupying the minimum
space for mule-back transportation.
The latex is conveyed to collecting
camps, where it is boiled down in
large vessels to a dough-like consis­
tency, then it is kneaded to remove
some of the water, and pressed in
wooden molds for exportation. The
largest quantity of the gum is pro­
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10
A
u t o m a t ic
duced in the southern states o f Mexi­
co, particularly Yucatan. The gum
as shipped from Mexico contains
about 50 per cent of water. On ar­
rival in New York it contains around
40 per cent water. The latex, when
fresh, resembles cow’s milk, but when
coalesced by boiling, it assumes a
grayish hue, though the color may
vary owing to the admixture of im­
purities. The latex is sometimes
adulterated with the milk of other
trees. In Mexico, the best chicle is
said to be produced by trees grown
in the higher altitudes. The tree yield­
ing chicle grows to a height o f from
40 to 50 feet, with trunk from 35 to
40 inches in diameter. Each tree
yields, on an average, 30 to 35 pounds
o f chicle per year. The trees are
tapped throughout the year with the
exception of the rainy period, which
lasts from three to four months. The
tree requires a good loamy soil and a
rainfall of about 90 inches.
Appearance
Crude chicle is quite hard, brittle
and easily reduced to fragments. It
varies according to purity, from a
light to a dark brown color and melts
very readily with heat, being easily
softened when held in the mouth.
When warm it is very ductile and ad­
hesive without perceptible odor or
taste, and is entirely free from any
injurious qualities.
Analysis of Crude Yucatan Chicle2
Per
Acetone soluble resins-----------
Gutta and hydrocarbons---------
P r o te in s -------------------------------
Sand and foreign matter-------
W a t e r ______________________
Mineral a s h --------------------------
Cent
40.0
17.4
0.6
2.3
35.0
4.7
2Dr. Frederic Dannerth, Journal of
Industrial and Engineering Chemis­
try, 1917, page 679.
Chicle Substitutes
A number of gums are regularly
cleaned and blended as substitutes
© International Arcade Museum
A
ge
for chicle and are largely used. The
ingredients of these substitutes are
the low-grade rubber from Borneo
known as Pontianak or jelutong and
the inferior guttas, among them be­
ing gutta siak, gutta kay, etc.; also
the Pontianak resin extracted from
jelutong as well as waxes, resins and
balsams of various sorts. Several
chicle substitutes have been patented
and others pass under special trade
names.
The aggregate tonnage of these
compounded gums annually employed
in the manufacture of chewing gum,
approximately equals or perhaps ex­
ceeds that of the pure chicle used.
Comparatively little chewing gum is
made o f a strictly chicle base and
much is made containing no chicle
whatever.
Methods of Making Chicle
Substitutes
There are various processes and
machines for the purification of gut­
tas, resins and low-grade rubber for
use as substitutes for chicle and for
chewing gum manufacture, some of
which have been patented.
Cleaning Crude Pontianak
James D. Darling, of Philadelphia,
patented the following methods:
Comminuted crude Pontianak, or
jelutong, is boiled in a receptacle for
a considerable time in an alkaline
solution consisting of 25 pounds of
caustic soda to 100 gallons of water.
The boiling is continued until all the
impurities are precipitated, while the
mixture of rubber and resin, purified
and changed in physical characteris­
tics, floats as a spongy mass. When
freed from the alkaline liquor this
mass is odorless and tasteless, but
still somewhat tough and resilient.
This product is removed and after
repeated washings is subjected to a
pulling or kneading operation by
which its physical qualities are fur­
ther changed.
During this treatment the mate-
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