Paint

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Application

Paint can be applied as a liquid, as a solid, or as a gaseous suspension. Techniques vary depending on the practical or artistic results desired.

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In the liquid application, paint can be applied by direct application using

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brushes, paint rollers, blades, other instruments, or body parts. Examples of body parts include fingerpainting, where the paint is applied by hand, whole-body painting (popular in the 1960s avant-garde movement), and cave painting, in which a pigment (usually finely-ground charcoal) is held in the mouth and spat at a wall (NOTE: DO NOT DO THIS modern paints, paints are highly toxic and this might cause death or permanent injury).

Related Topics:
Brushes - Paint rollers - Blades - Fingerpainting - Whole-body painting - 1960s - Avant-garde - Cave painting - Pigment - Charcoal - Toxic - Death

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Paint may also be applied by flipping or spraying the paint, dripping, or by dipping an object in paint.

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As a solid (usually in industrial and automotive applications), the paint is applied as a very fine powder, then baked at high temperature. This melts the powder and causes it to adhere (stick) to the surface. The reasons for doing this involve the chemistries of the paint, the surface itself, and perhaps even the chemistry of the substrate (the overall object being painted).

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As a gas or as a gaseous suspension, the paint is suspended in solid or liquid form in a gas that is sprayed on an object. The paint sticks to the object. The reasons for doing this include:

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• the application mechanism is air and thus no solid object ever touches the object being painted;
• the distribution of the paint is very uniform so there are no sharp lines
• it is possible to deliver very small amounts of paint or to paint very slowly;
• a chemical (typically a solvent) can sprayed along with the paint to dissolve together both the delivered paint and the chemicals on the surface of the object being painted;
• some chemical reactions in paint involve the orientation of the paint molecules.

Paint is often applied to walls with a roller. Rollers generally have a handle that allows for different lengths of poles which can be attached to allow for painting at different heights. Generally, roller application takes two coats for even color. A roller with a thicker nap is used to apply paint on uneven surfaces. Edges are often finished with an angled brush.

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