REVIEW OF RELATED LITERATURE
This part presents an evaluation several writings that would be helpful to the study based from other literature. It aims to present information about current and significant advancements associated to the study.
Charcoal is a black porous residue obtained by the destructive distillation of animal or vegetable matter in a limited supply of air. The basic atomic structure of the char is independent of the precursor, although the larger scale morphology may differ. It is important not to confuse charcoal with other forms of impure non-crystalline carbon such as coke and soot. Although coke, like charcoal, is produced by solid-phase pyrolysis (usually of bituminous coal), it is distinguished from charcoal in that a fluid phase is formed during carbonisation.
Used engine oil or engine oil is an oil used for lubrication of various internal combustion engines. The main function is to lubricate moving parts; it also cleans, inhibits corrosion, improves sealing, and cools the engine by carrying heat away from moving parts.
A whiteboard marker is a non-permanent marker (also called a whiteboard marker or dry-erase marker) uses an erasable ink, made to be used on a slick, non-porous writing surface, for temporary writing with overhead projectors, whiteboards, and the like. They may also be used by children, making marks that are easy to clean. The erasable ink does not contain the toxic chemical compounds xylene and/or toluene as have been used in permanent markers. Wet erase markers are another version that are used on overhead projectors, signboards, whiteboards, and other non-porous surfaces.
In the ancient times, people have used their own ways of writing, coming informs of carving, using colored liquids such as oil, and even making use of improvised sticks and stones. The most common...
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