Retr0Bright: Does re-yellowing occur even in the absence of UV light?

On 01/15/2013 07:37 PM, David Riley wrote: White crystals in a dark blue glass bottle, usually sold wrapped in equally dark blue paper. Dump a capful into a glass and add water, and the mixture results in a vigorous foaming liquid (largely a result of the sodium bicarbonate and citric acid to make the bubbles). More vigorous in action than Alka-Seltzer, which contains basically the same bubble-making agents, but no bromide, all pressed into a slow-dissolving tablet. Seidlitz powder was similar, but used cream of tartar as the acid and resulted in a laxative effect--basically baking powder with a medical attribution. I think all three arose in popularity because people seem to like the effects of dissolved carbon dioxide in their drinks, most especially, beer and sparkling wines--not to mention overpriced spring water. None other than Joseph Priestly figured out a way to dissolve pressurized carbon dioxide in water, thereby inventing seltzer water and giving belated birth to an industry selling carbonated municipal tap water for ridiculous prices,creating piles of plastic bottles littering the nation's byways. --Chuck