The Manufacture of Chocolate and other Cacao PreparationsZipperer, Paul
Science
The Manufacture of Chocolate and other Cacao Preparations
Zipperer, Paul
Cacao; Chocolate; Cocoa
to make the planter’s life a burden.
d) Gathering and Fermentation.
The gathering of the fruit is effected by means of long rods, at
the end of which is a semi-circular knife for cutting through the
stalk. The fruits are then split in two, the beans separated from the
surrounding pulp and spread out on screens to dry, or exposed to the
sun on bamboo floors. Beans so prepared are described as unfermented.
In most lands where cacao is cultivated, another process is adopted,
calculated to heighten the flavour of the fruit and develop its
nutritious constituents. The newly gathered beans are first partially
freed from the fruity substances always adhering, then piled up into
heaps and covered with banana skins or cocoa-nut matting, in order
that they may be shut off as far as possible from all atmospheric
influence, and so left for some time, while the chemical processes of
warming and fermentation are gradually consummating. This procedure
is alternated with repeated exposures to the sun, according to the
maturity and species of the cacao bean, and the prevailing weather
conditions; though details as to the length of time and number of
repetitions necessary to the production of a marketable article
still await determination.[6] It may be taken as a general rule that
fermentation should proceed till the bean, or rather the cotyledon,
has acquired the light brown colour characteristic of chocolate. This
principle is nevertheless often violated, especially as loss of weight
in the bean is often intimately connected with complete fermentation.
Unsufficiently fermented varieties, but which were fully ripe when
gathered, develop a violet colour during this process; it is possible
for them to pass through what is known as “After fermentation” before
reaching the factory. This is not so in the case of beans developing
from unripe fruit, for obviously the valuable constituents of the
cotyledon are here not prominent, and scarcely calculated to ferment
properly. Such can be recognised by their betraying a bluish grey
colour in the drying processes, and the soft and smooth structure which
they then acquire. A normal progress of fermentation is indicated where
the interior of the mass of beans registers, on the first morning after
gathering, a temperature not exceeding 30-33° C, 35-38° on the second
day, and on the third morning a temperature not exceeding 43° C. If the
outer shells are marked, the heating has been too severe. In countries
where the harvest season suffers from the periodical rains, drying over
wooden fires[7] is often resorted to. The value of many specimens is
hereby greatly diminished when the roasting is carelessly managed, for
the smoke must on no account be allowed to come into contact with the
bean. Yet “Smoky” lots among the St. Thomas, Accra, and Kameroon sorts
were formerly much more frequent in commerce than now, for the planter
has learned to avoid this evil. After they have been fermented, the
Public-domain text, read in full here on John Shaqi.
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