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Lean Based Time & Motion Analysis

In: Business and Management

Submitted By ahmadaltaher
Words 13854
Pages 56
Chapter 1
Inroduction
Paint History

Chapter 1 1.1 Paint History:

Paint is one of the oldest synthetic substances known, with a history stretching back into prehistoric times. Prehistoric man made it more than 35,000 years ago as they mixed clays and chalks with animal fats and used these paints to depict their hunts on cave walls. By 2500BC, Egyptians had improved the technology by developing a clear blue pigment by grinding azurite, gums, wax and egg white as binders and solvents for their paints. Greeks learnt to blend paints with hot wax, rather than water, making paint both thicker and easier to spread. By this time, colours were available from natural and synthetic sources, one of the most interesting being a purple pigment made from heating yellow earth till it turned red and then plunging it into vinegar. In the eighteenth century, paint factories began to open in Europe and America, and by the nineteenth century, mass production had brought prices down where houses began to be painted. In the twentieth century, paint manufacturing and its function is widely understood especially from chemical point of view, meaning that paint manufacture has finally moved from being an art to being a science.

1.2 Paint Importance and Its Production:

Paints are used for the protection and appearance enhancement of houses, buildings, cars, ships and many more. They are used as a safety feature to grab person attention like in lane markings on road and in emergency paths to evacuate. Paints are essentially a mixture of a solvent, a binder (that sticks to the surface) and a pigment (which provides colour, opacity and protection of the surface concerned). The manufacture of paint is, in principle, simple. The pigment, binder and thinner must be blended in the correct proportions such that, when the paint is applied, the final finished film

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