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The resistance of a material to compression, indentation and scratching. There are several scales, and the data in the book gives both the scale used and the value on it....

A substance or mixture of substance added to a material to increase or control the curing reaction by taking part in it....

The process whereby the current shape of a plastic is transformed to another desired configuration....

A mark on a molded piece made by the meeting of two flow fronts during molding. Also called weld line....

The ratio, within the elastic limit, of the applied stress on a test specimen in flexure to the corresponding strain in the outermost fibers of the specimen....

Wide gate extending from a runner, which runs parallel to an edge of a molded part along the parting line of a mold....

Films are flat materials that are extremely thin in comparison to its length and breadth. Typically, a film has a maximum nominal thickness of 0.25 millimeters. ...

Fillers are used to make a resin less costly. They can be inert or they can alter some properties of the plastic. Reinforcements are substances used to strengthen or give dimensional stability to a material....