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Blu-Tack
Blu-tack is a reusable putty-like pressure-sensitive adhesive produced by Bostik, commonly used to attach lightweight objects (such as posters or sheets of paper) to walls or other dry surfaces. Traditionally blue, it is also available in other colours. Generic versions of the product are also available from other manufacturers.
The composition of Blu-Tack is a manufacturing secret but is described as a synthetic rubber compound without hazardous properties under normal conditions. It can be swallowed without harm and is noncarcinogenic. It is non-soluble and is denser than water. The material is not flammable, but emits carbon dioxide and carbon monoxide when exposed to fire or high temperatures.〔(【引用サイトリンク】accessdate=2014-12-02 )〕
== History ==
In 1970, laboratory researcher Alan Holloway was working for sealant manufacturer Ralli Bondite of Waterlooville, England. Ralli Bondite was a wholly owned subsidiary of G & L Ralli Investment & Trustee Co. Ltd. Holloway inadvertently produced a product that was useless as a sealant, but pliable and semi-elastic. This novelty product was demonstrated by Ralli Bondite management to visiting executives from another sealant and adhesive manufacturer, as a means of wall mounting notices. There was no need for secrecy about the formula, as it was of no use for a gun-grade mastic, the main product of Ralli Bondite. Initially the potential of this material was not fully recognised, but later Bostik commenced research into the development of what they were eventually to launch as Blu-Tack. In its conceptual stage Blu-Tack was white, but consumer research showed fears that children may mistake it for chewing gum, and the product was coloured blue.
In the United Kingdom in March 2008, 20,000 numbered packs of pink Blu-Tack were made available, to help raise money for Breast Cancer Campaign, with 10 pence from each pack going to the charity. The formulation was slightly altered to retain complete consistency with its blue counterpart. Since then, many coloured variations have been made, including red and white, yellow and a green Halloween pack.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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