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Composition ornament ("compo") is a mouldable thermoplastic compound, consisting of powdered chalk mixed with collagen (hide glue), resin (pine rosin) and linseed oil; worked either by hand or more usually pressed into moulds to produce decorative work.
The Smith Chemical Company was started in G. Frederick Smith's garage in Urbana, Illinois as a result of his use of magnesium perchlorate as a super drying agent. [9] [10] [13] Smith enlisted the help of his brothers Allyne (who studied engineering at Ohio State) and Clarence (who worked for a local newspaper).
Chalk art by kids in the Czech Republic. On September 16–17, 2006, a global event was held to promote peace through sidewalk chalk drawings. [5] Chalk4Peace was a project planned by an artist from Arlington, Virginia named John Aaron, who asked children and teens from the age of eight to age eighteen to participate in groups across the world to draw chalk drawings that would illustrate peace ...
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Hagoromo Bungu sold the following chalk products: [5] [16] Fulltouch Chalk: calcium chalk; Fulltouch Large Chalk: calcium chalk, 2 cm in diameter and 11.3 cm in length, available in white, red, orange, yellow, green, and blue [25] Fulltouch New Poly: gypsum chalk, sometimes known as plaster chalk; Fulltouch Luminous Color Chalk: gypsum chalk
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. [4] It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.
The exact formula of Phos-Chek is not public knowledge but the company has said in previous filings that the product is 80% water, 14% fertiliser-type salts, 6% colouring agents and corrosion ...
With the addition of a grit such as boron carbide (in a modified formulation given as 70% KClO 3, 19% red phosphorus, 3% sulfur, 3% chalk, and 5% boron carbide by weight), Armstrong's mixture has been considered for use in firearm primers. [5] This use as primer for artillery propellants may have been Armstrong's original purpose. [6]