Paste (rheology) 922972 220378869 2008-06-19T15:59:11Z Srleffler 252195 See also gel. :For other meanings of paste see [[Paste|Paste (disambiguation)]] {{Unreferenced|date=November 2007}} In [[physics]], a '''paste''' is a substance that behaves as a [[solid]] until a sufficiently large load or [[stress (physics)|stress]] is applied, at which point it flows like a [[fluid]]. In [[rheology|rheological]] terms, a paste is an example of a [[Bingham plastic]] [[fluid]]. Pastes typically consist of a [[suspension (chemistry)|suspension]] of [[granular material]] in a background fluid. The individual grains are jammed together like [[sand]] on a [[beach]], forming a disordered, [[glass]]y or [[amorphous]] structure, and giving pastes their solid-like character. It is this "jamming together" that gives pastes some of their most unusual properties; this causes paste to demonstrate properties of [[fragile matter]]. In pharmacology, '''paste''' is basic [[pharmaceutical form]]. It consists of fatty base (e.g., [[petroleum jelly]]) and at least 25% solid substance (e.g., [[zinc oxide]]). Examples include [[starch]] pastes, [[toothpaste]], [[Mustard (condiment)|mustard]], and [[putty]]. ==See also== *[[Gel]] [[Category:Materials]] [[Category:Pharmacology]] {{material-stub}} [[de:Paste (Stoff)]] [[da:Masse (materiale)]] [[cs:Pasta]] [[lt:Pasta]]