maybe you meant this.......crack spread refers to the margin.....how much money a refinery makes off of each barrel of oil they refine "crack" into finished products.......assuming they do not hedge against price fluctuations........the method used is called the 3-2-1 Crack Spread.......for every 3 barrels of oil and refiner could expect to get 2 barrels of unleaded gasoline and 1 barrel of heating oil.......right now the crack spreads are the lowest of the year.....this is why refiners are getting slammed.....especially the ones who did not lock in prices.....like WNR.
Crack is a free-base form of cocaine. Cocaine is in a salt form and has a decomposition temperature very close to its combustion temperature. Thus, if you smoke cocaine much of the pharmacological effect will be lost. Thus, if insist upon a pulmonary route of adminstration of cocaine you are best suited by converting the cocaine hydrochloride into a free base form of the drug. The free base form of cocaine has a higher decomposition temperature than the salt form and can be burned without losing the intended effect. One process for this conversion requires the use of the highly inflammable ether (burns like crazy). Richard Pryor serves as an example of what can happen when you mix ether and fire. Crack is also a free-base form of cocaine but a different and safer process is used for the conversion. Crack will also be cut with baking soda and in some cases a hint of nutmeg and cinnamon (according to Dave Chapelle). I would not recommned using any of these drugs.