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 spelling now used is without the hyphen.
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.
Blu Tack was originally developed in 1969 as an accidental by-product of an attempt to develop a new sealant using chalk powder, rubber and oil. The name of the inventor is unknown. Originally Blu-Tack was white, but consumer research showed fears that children may mistake it for chewing gum, and a blue colouring was added.
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.
Similar products of various colours are made by many manufacturers, including Faber-Castell's "Tack-it", Henkel's "Fun-Tak", UHU's "Poster Putty" and "Sticky Tack","Gummy Sticker" Pritt's "Sticky Stuff" and Elmer's "Poster Tack".
Versions of the product are also sold under the generic names "adhesive putty" and "mounting putty". The generic trademark or common name for mounting putty varies by region. It is known as "Patafix" in France, Italy and Portugal (a phonetic abbreviation for pâte à fixer, "fastening dough" in French), Kennaratyggjó ("teacher's chewing gum") in Iceland, and Häftmassa ("attachment mass") or kludd in Sweden.
Like all poster putties, Blu-Tack provides an alternative to the artist's traditional kneaded eraser, having a superior grip and plasticity. Blu-Tack can be finely shaped and worked into even very small areas. Like kneaded erasers, it can be stretched and kneaded to freshen its working surfaces. One of the early adopters and staunch exponent of Blu-Tack's use as a kneadable eraser replacement is the UK artist Mike Sibley. Blu-Tack, especially if kept warm in the artist's free hand, is far more versatile than a kneadable eraser. It can, for example, remove or tonally adjust the top layer of graphite without affecting the underlying detailed layer. It also works with the lightest of touches, where kneadable erasers need some pressure to pick up graphite. A further benefit is that graphite removed by Blu-Tack is securely held and will not be reapplied during successive erasing.
Some scale model hobbyists use Blu-Tack as a masking medium for painting camouflage schemes, as it can be easily molded to any shape and will not react with or lift the underlying paint.
Blu-Tack is also used for sculpture. In 2007 artist Elizabeth Thompson created a 200 kg (440 lb) sculpture of a house spider using Blu-Tack over a wire frame. It took around 4000 packs and was exhibited at London Zoo. Other artists have created works from the material including stop-motion animation.
A small amount of Blu-Tack can be placed on the head of a screw to hold it onto a screwdriver.
- http://www.ikodesign.co.uk. "Bostik Blu Tack - A re-usable adhesive". www.bostik.co.uk. Retrieved 2017-06-17.
- "Welcome to Blu Tack.com - FAQ". Archived from the original on April 18, 2010. Retrieved October 14, 2016.
- "Safety Data Sheet Bostik Blu Tack" (PDF). Retrieved 2014-12-02.
- Ward, James (2015). Adventures in Stationery (paperback ed.). London: Profile Books. p. 213. ISBN 978 1 84668 616 0.
- Ward, James (2015). Adventures in Stationery (paperback ed.). London: Profile Books. pp. 213–214. ISBN 978 1 84668 616 0. (Statements on the internet suggesting that Blu Tack was invented by somebody called ‘Alan Holloway’ all appear to derive from an unsourced 2007 edit to this page, since removed).
- "Daily Express | UK News :: Blu-Tack goes pink for charity". Express.co.uk. 2008-03-04. Retrieved 2009-07-28.
- BluTack Website. "How to use Blu Tack". Retrieved 2015-02-23.
- "Erasing Pencil with Blu-Tack putty". SibleyFineArt.com.
- "How do you do the cammo technique with Blu-tac?". Britmodeller.com.
- tulpastudios Elizabeth Thompson+ Add Contact. "Elizabeth Thompson Blu tack spider | Flickr – Photo Sharing!". Flickr. Retrieved 2012-01-31.
- JessKattDesign,conceptart.org. "My stop motion animations – Blu tack Dog".
- "The Sound of Surprise (the loudspeaker/stand interface)". Stereophile.com.
- BluTack Website. "How to use Blu Tack". Retrieved 2016-03-03.