. Rubber hand stamps and the manipulation of rubber; a practical treatise on the manufacture of India rubber hand stamps, small articles of India rubber, the hektograph, special inks, cements, and allied subjects . t is rolled into a ball and called cabezza;the dried strips pulled oat of the cuts is of verygood quality and is called hola or hurucha. From Brazil is exported the famous Para indiarubber. This is of very high quality, and is greatlyesteemed by all manufacturers. No process canmake a poor gum give a really good product. Thesystem of gatliering it varies. Sometimes the treeis cut in
. Rubber hand stamps and the manipulation of rubber; a practical treatise on the manufacture of India rubber hand stamps, small articles of India rubber, the hektograph, special inks, cements, and allied subjects . t is rolled into a ball and called cabezza;the dried strips pulled oat of the cuts is of verygood quality and is called hola or hurucha. From Brazil is exported the famous Para indiarubber. This is of very high quality, and is greatlyesteemed by all manufacturers. No process canmake a poor gum give a really good product. Thesystem of gatliering it varies. Sometimes the treeis cut into by gashes from an axe, such gashes ex-tending in a row all around the trunk. Under eachgash a small clay cup is luted fast with some freshmixed clay. These collect from a tablespoonful ofjuice upward, which is collected, and the cups areremoved on the same day. The next day a secondrow of cuts is made below the others, and the same AND THE MANIPULATION OF RUBBER. 21 process is repeated. This is continued until from apoint as high as a man can reach, down to theground the tree is full of cuts. Sometimes a gutterof clay is found partly around the trunk withcrashes above it. In other cases a vine is secured. Tree Tapped for India Rubber. around the tree and a collecting gutter is worked with it for a basis. « v, f The iuice is coagulated in a smoky fire. A dot-tomless jar is placed over the fire and some palmnuts are mixed with the fuel. The mould, which ,soften a canoe paddle, is smeared with clay to pre-vent adhesion and is then heated. A cup of ]uiceis poured over it, and after the excess has droppedoff it is moved about rapidly over the smoke and 22 nUBBER HAND STAMP MAKING hot air which ascends from the mouth of the series of operations is repeated until the coat-ing is quite thick; it may be as much as five solidifying over night it is cut open and thepaddle or mould is removed. After a few days dry-
Size: 1485px × 1682px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, bookidrubberhandstamps01sloa
