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

Mixed Sheet--Outlines of Moulding--Home-Made Vulcanizing Press--Further Simplifications of Same--Securing Accurate Parallelism of Platen and Bed--Distance Pieces--Wood vs. Iron...

India rubber or caoutchouc is a very peculiar product, which is found in and extracted from the juice of certain trees and shrubs. These are quite numerous and are referred for...

African india rubber is mostly exported from the west coast. The belt of country producing it extends nearly across the continent. Those who are familiar with the india rubber p...

There are two broad divisions to which all varieties of india rubber can be assigned--unvulcanized and vulcanized rubber. Speaking with a certain amount of license it may be sai...

The manufacture of india rubber relates to the production of two principal products. One is masticated unvulcanized sheet and thread rubber; the other is unmasticated mixed and...

We have seen that india rubber cannot be cast in moulds. Except in special cases deposition from solution is not available. It has to be shaped by a combination of heat and pres...

India rubber type are often used to set up different inscriptions in wooden handles, or different date figures in rubber stamps. The latter are in such cases made with slots or...

Although all reference hitherto in the matters of stamps and type has been to their manufacture from uncured india rubber, a good deal can be done with vulcanized and cured gum....

Matrices for stamp moulds can be made by several of the methods used by stereotypers. Thus an electrotype could be taken directly from the face of the type. There would be littl...

India rubber can be so readily shaped in moulds and the latter are so readily made of plaster of paris that any one who is interested in such things will find endless amusement...

The manipulation of pure sheet rubber is simple, yet is liable to lead to disappointment. When two pieces are laid face to face and cut across with a sharp knife, or scissors, t...

The regular methods of vulcanizing and curing can be departed from and good results obtained. A few excellent methods differing essentially from the ordinary ones are described...

India rubber presents some difficulties in its solution. If a piece of pure gum just as received by the factory is placed in hot water it will swell and whiten after a while, bu...

_Ebonite and Vulcanite._--These two well known substances are india rubber, in which the vulcanization process has been intensified. From twenty-five to fifty per cent. of sulph...

Stamps made from a mixture of glue, glycerine, and molasses or from similar mixtures are an excellent substitute for india rubber stamps. Properly made they possess all the flex...

For obtaining multiple copies of writing, the apparatus called the Hektograph or Papyrograph has been extensively adopted. In general terms it consists of a tray filled with a j...

Before cementing vulcanized rubber the surface should be roughened or still better it may be seared with a red hot iron. For bicycle tyres this is especially to be recommended.

For very bright red 3 parts of Eosin BBN. are used. In this case the acetic acid must be omitted. In all cases the colors should first be rubbed up with the water in a mortar, a...

II. The above process is applicable to all articles, but is specified for hose. It is stated that old rubber that has become hard may be softened by exposure first to vapor of c...