Bright beer

Bright beer is beer in which yeast is no longer in suspension. There are several methods used for clearing yeast from beer, from waiting for the yeast to drop of its own accord ("dropping bright") to filtering it.

Dropping bright

When the concentration of fermentable sugars in the beer falls below a certain level, variable with the strain of yeast, the yeast cells will naturally flocculate and settle toward the bottom of the vessel in which the beer is stored; this act is known as dropping bright. The degree to which yeast flocculates is dependent on many factors, including the specific gravity of the beer, the gas pressure over the beer, the ambient temperature, and some biological properties particular to the yeast strain; some beers will never drop bright by themselves.

Some breweries make available rack bright beer, which is cask-conditioned beer that has dropped bright at the brewery and then racked, transferred, to a new container for shipment. Rack bright beer generally costs slightly more than ordinary beer, all else being equal, but requires less preparation time and care at the point of serving; in particular, dropping bright requires that the beer be left undisturbed to settle, as jarring or shaking its container will re-suspend the yeast.