Acidic tobacco additives such as levulinic acid are used as "smoothing" agents to reduce smoke harshness. Source: Internet
Additives Besides the three main categories of ingredients, paint can have a wide variety of miscellaneous additives, which are usually added in small amounts, yet provide a significant effect on the product. Source: Internet
Again there is considerable reluctance to this use as the additives, soot and wear metals will seriously poison/deactivate the critical catalysts in the process. Source: Internet
Acids are used as additives to drinks and foods, as they alter their taste and serve as preservatives. Source: Internet
A key ingredient that makes cigarettes more addictive is the inclusion of reconstituted tobacco, which has additives to make nicotine more volatile as the cigarette burns. Source: Internet
All motor oil labels wear mark similar to "of outstanding quality" or "quality additives," the actual comparative evidence is always lacking. Source: Internet