Question

State composition of type metal:
A.Lead, tin, antimony
B.Lead, tin
C.Chromium, nickel
D.Copper, tin

Answer 1

Hint: Metals can be mixed to various forms according to the need. That combination of one or more metals for specific needs are termed as alloys. Alloys are again modified to produce various elements.

Complete step by step answer:
Firstly, let's talk about the types of metals. Metal are of three types namely, ferrous metal, non-ferrous metals and alloys.
Now, what are these ‘type metals’? Type metals are nothing but the metals used in printing type.
Basically, type metals are made by mixing the alloy of lead, tin and antimony to produce printing type characters. For longevity, antimony and tin are applied to lead thus reducing the disparity between the matrix and the alloy expansion coefficients. The alloy takes a fine and transparent picture of the mould in which it hardens, extending upon solidification. It has a melting point that is low. Once used widely for structure, it is often used in producing the metal pieces of different musical instruments and elaborate style and pattern ornaments.

So, the correct answer is Option A.

Additional Information:
The general requirements for type-metal, apart from durability, are that it should create a true and sharp cast and retain the correct dimensions and shape after cooling down. It should also be easy to cast, iron should not be dissolved in the molten metal at a relatively low melting point, and mould and nozzles should remain clean and easy to preserve.

Note:
The desired properties for various forms of typecasting and printing processes are created by changing the proportions of the metals. In the first half of the 15th century, the use of the metal type started. It is also used for producing decorative pieces such as statuettes and candlesticks.