The Preparation of Plantation RubberMorgan, Sidney
Science
The Preparation of Plantation Rubber
Morgan, Sidney
Rubber
In the matter of costs of working the writer has had to investigate several
cases regarding which there was dissatisfaction. In some instances it was
found that the stations had not been placed advantageously with respect to
a water-supply; and instead of one or two coolies pumping for an hour or
two, a larger number had to be employed for hours in the carriage of water
from the nearest available source. This meant that, as the coolies were on
daily wage, the force appeared to be much bigger than that usually
required. In other cases there were too many store coolies, when often the
place of some could have been taken for the necessary period by tappers
arriving early from the nearer fields. Sometimes costs were increased by
reason of the use of an excess of chemicals, owing to the lack of uniform
rules throughout the several stations. In spite of all that has been
written, and the verbal instructions that have been given, it was not
uncommon to find unstable chemicals such as sodium bisulphite exposed to
the moist air. In this way not only was there waste of material, but also
the probability of inferior rubber being made.
TRANSPORT OF COAGULUM.--On the whole if it is a question between the
transport of latex and the transport of coagulum, the writer would always
favour the latter, for reasons which have possibly been made clear in the
preceding paragraphs. In effect, it should be recognised that the less
handling and transport the latex receives the better the general result.
If proper precautions are taken, the transport of coagulum intended for the
preparation of crepe should present no difficulty, and should have no
injurious effect upon the quality of the resultant rubber. It is only too
common, nevertheless, to note defects, in the finished crepes, which can
only be attributed to a failure to observe reasonable care in the transport
of the coagulum. For example, it has been observed that a mass of coagulum
from a coagulation station has been conveyed on the floor of a
bullock-cart, or motor-lorry, previously used in the carriage of other
materials. Unless the boards have been most scrupulously cleansed, the
coagulum is found to be contaminated, often to a marked degree. Again,
although the cart may be clean, it may have to travel some distance on
roads carrying a fair amount of motor traffic. Even should the cart have a
canopy, road-dust is often whirled through the open sides of the cart; and
in the districts where red laterite roads are common, the stain of such
dust often persists in the finished crepe. It scarcely need be remarked
that coagulum should be transported in closed wooden boxes or in galvanised
iron drums fitted with lids; and that preferably sufficient water should
be present in these receptacles to allow the coagulum to float. All such
containers should receive the same scrupulous attention as the vessels
employed in the transport of latex.
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