Editing Silly Putty (section)

==Description==
[[File:Sillyputty.ogv|thumb|right|250px|Video showing Silly Putty bouncing]]

As a bouncing [[putty]], Silly Putty is noted for its unusual characteristics. It bounces when dropped from a height, but breaks when struck or stretched sharply; it can also float in a liquid and will form a [[puddle]] given enough time. Silly Putty and most other retail putty products have [[viscoelasticity|viscoelastic]] agents added to reduce the flow and enable the putty to hold its shape.<ref name=Thayer>{{cite journal|last1=Thayer|first1=Ann|title=What's That Stuff? Silly Putty|journal=Chemical & Engineering News|date=November 27, 2000|volume=78|issue=48|url=http://pubs.acs.org/cen/whatstuff/stuff/7848scit3.html|access-date=30 September 2015}}</ref>

The original coral-colored Silly Putty is composed of 65% [[Siloxane|dimethylsiloxane]] ([[hydroxyl|hydroxy]]-terminated polymers with [[boric acid]]), 17% [[silicon dioxide|silica]] (crystalline quartz), 9% Thixatrol ST ([[castor oil]] derivative), 4% [[polydimethylsiloxane]], 1% decamethyl [[cyclopentasiloxane]], 1% [[glycerol|glycerine]], and 1% [[titanium dioxide]].<ref name=Bouncing>{{cite web|title=The Synthesis of Bouncing Putty|url=http://www.wou.edu/las/physci/ch462/BouncingPutty.htm|publisher=[[Western Oregon University]]|access-date=27 February 2015|quote=See patent pages}}</ref>

[[File:Silly putty dripping.jpg|thumb|left|180px|Silly Putty flowing through a hole]]

Silly Putty's unusual flow characteristics are due to the ingredient [[polydimethylsiloxane]] (PDMS), a [[viscoelasticity|viscoelastic]] substance. Viscoelasticity is a type of [[Non-Newtonian fluid|non-Newtonian flow]], characterizing a material that acts as a [[viscosity|viscous]] [[liquid]] over a long time period but as an [[elasticity (physics)|elastic]] [[solid]] over a short time period.<ref name=Clegg>{{cite journal|last1=Clegg|first1=Brian|title=Polydimethylsiloxane|journal=Chemistry World|date=22 July 2015 |url=http://www.rsc.org/chemistryworld/2015/07/polydimethylsiloxane-pdms-silly-putty-podcast|access-date=30 September 2015}}</ref> Because its apparent viscosity increases directly with respect to the amount of force applied, Silly Putty can be characterized as a [[dilatant]] fluid.<ref name=Thayer/>

Silly [[Putty]] is also a fairly good [[adhesive]]. When [[newspaper]] ink was petroleum based, Silly Putty could be used to transfer newspaper images to other surfaces, providing amusement by distorting the transferred image afterwards. Newer papers with soy-based inks are more resistant to this process.<ref name=Holmes>{{cite news|last1=Holmes|first1=Owen|title=Silly Putty Doesn't Work Anymore|url=http://www.altweeklies.com/aan/silly-putty-doesnt-work-anymore/Story?oid=168408|access-date=30 September 2015|work=Folio Weekly|date=August 1, 2006}}</ref>

Generally, Silly Putty is difficult to remove from textured items such as dirt and clothing. Hand sanitizers containing alcohol are often helpful. Silly Putty will dissolve when in contact with an alcohol; after the alcohol evaporates, the material will not exhibit its original properties.<ref name=HowStuffWorks>{{cite web|title=How to Get Silly Putty Out Of Clothes|url=http://home.howstuffworks.com/how-to-get-silly-putty-out-of-clothes.htm|access-date=30 September 2015|website=HowStuffWorks.com|date=2011-06-28}}</ref>

If Silly Putty is submerged in warm or hot water, it will become softer and thus "melt" much faster. It also becomes harder to remove small amounts of it from surfaces. After a long period of time, it will return to its original viscosity.<ref name=Bouncing/>

Silly Putty is sold as a {{Convert|13|g|oz|adj=on|abbr=on}} piece of clay inside an egg-shaped plastic container. The Silly Putty brand is owned by Crayola LLC (formerly the Binney & Smith company). {{As of|July 2009}}, twenty thousand eggs of Silly Putty are sold daily. Since 1950, more than 300 million eggs of Silly Putty (approximately {{Convert|4500|ST|t|disp=or}}) have been sold.<ref name=history>{{cite web|title=Silly Putty History|url=http://www2.crayola.com/mediacenter/index.cfm?display=press_release&news_id=164|archive-url=https://web.archive.org/web/20080603053016/http://www.crayola.com/mediacenter/index.cfm?display=press_release&news_id=164|url-status=dead|archive-date=June 3, 2008|publisher=Crayola LLC|access-date=March 28, 2013}}</ref> It is available in various colors, including [[Phosphorescence|glow-in-the-dark]] and metallic. Other brands offer similar materials, sometimes in larger-sized containers, and in a similarly wide variety of colors or with different properties, such as magnetism and [[iridescence]].{{cn|date=October 2024}}

[[File:Sputty.jpg|thumb|right|237px|Silly Putty in the form of a solid cube]][[File:Магнитен Интелигентен пластилин.jpg|thumb|Magnetic thinking putty]]