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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.
The liquid is then allowed to travel up the chalk; polar dyes would tend to stick to the chalk and not travel significantly while non-polar dyes would travel up with the solvent. Once it travels almost to the top of the chalk, it is removed from the beaker. The chalk chromatogram, with separation of colours, can then be observed in a dark room. [2]
Chalk carving is the practice and shaping of chalk via carving. This article covers some methods, types of chalk, tools used and the benefits (and ramifications) of this material. The benefits of this material are also its drawbacks. Its main benefit, its softness, makes it very easy to manipulate.
Chalk – a rock composed of porous biogenic calcium carbonate. CaCO 3; Chrome green – chromic oxide and cobalt oxide. Chrome orange – chrome yellow and chrome red. Chrome red – basic lead chromate – PbCrO 4 +PbO; Chrome yellow/Paris yellow/Leipzig yello – lead chromate, PbCrO 4
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is chalk a salt? because i read a book saying it is so but my teacher disagree\-from aldeen of sci-tech-- 06:33, 31 July 2006 58.69.61.146 Yes in fact. Chalk is a salt. Blackboard chalk is Calcium carbonate whereas gym chalk is Magnesium Carbonate. A salt is any compound that results from a neutralization reaction (acid-base reaction).
2. KFC Chicken. The "original recipe" of 11 herbs and spices used to make Colonel Sanders' world-famous fried chicken is still closely guarded, but home cooks have found ways of duplicating the ...