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The term liquid chalk, or sharkchalk, refers to several different kinds of liquified chalk including liquid-chalk marking pens (with water-soluble ink), liquid-chalk mixtures (for athletic use: rock climbing, weightlifting, gymnastics), and liquid-chalk hobby-craft paints made of cornstarch and food coloring (some with small amounts of flour).
Wet wipe markers were often used on overhead projector transparencies, as they could be stored and transported easily, unlike a traditional chalkboard. With the rise of computerized slide-shows (e.g. PowerPoint ) in the classroom and office, overhead usage has reduced substantially, and with it, the wet wipe marker.
Specialized felt-tip pens referred to by names such as "liquid chalk" or "chalkboard markers" are used to write on chalkboards. Markers with wide tips and bright but transparent ink, called highlighters, are used to highlight text that has already been written or printed.
Boxes of Hagoromo Fulltouch Chalk, produced by Hagoromo Bungu. Hagoromo Fulltouch Chalk (Japanese: 羽衣フルタッチチョーク, Korean: 하고로모 풀터치 분필) is a South Korean-owned brand of chalk for blackboards, originally produced by Japanese company Hagoromo Bungu (羽衣文具). Production of the chalk began in 1932.
A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
Bitumen – highly viscous liquid or semi-solid form of petroleum. Blende; Brimstone – sulfur; Flowers of sulfur – formed by distilling sulfur. Caustic potash/caustic wood alkali – potassium hydroxide, formed by adding lime to potash. Caustic Soda/caustic marine alkali – sodium hydroxide, NaOH, formed by adding lime to natron.
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