Djarum
Djarum is a popular brand of clove cigarettes (or kreteks) manufactured in Indonesia. The clove ingredient provides eugenol to the mouth, throat, and lungs. It acts as a local anesthetic and produces a tingling sensation. Some claim eugenol also produces a mild euphoric "high", though hard evidence on this effect is inconclusive.
Blacks
The most popular subbrand of Djarum cigarettes (internationally at least), Djarum Blacks, is sold in black packaging. Each cigarette is rolled in black paper. They are sold in flat, skinny packs of twenty cigarettes, rows of ten across and two deep. The package bears an embossed Djarum clove logo, and a stylized red "A" in the word "Black". They are popular with members of the goth subculture and hipsters in North America and Europe, though in many areas this is a passing fad. Blacks are a mid-potency cigarette, comparable with "Medium 100" ("Blacks" are sold only in the 100mm variety) flavor cigarettes of many other common brands like Marlboro, though their tastes are dissimilar, attributable to the Asian "Srintil" versus American tobacco and the addition of cloves. By weight, cloves make up about 40% of the cigarette, the remaining 60% being tobacco. The filter of Blacks are coated in a spiced "sauce", flavored with spices native to the region; mainly the taste is of clove, cardamom, and cinnamon; the "sauce" is also rather sweet. Blacks are packed much tighter than most American brands of cigarettes, and tend to be hard to draw from for the first few drags. They also have a tendancy to go out if not drawn from regularly, an effect that is exaggerated if the user packs the cigarettes prior to use. An additional effect of tight packing is the propensity for Blacks to burn 1/4-1/3 longer than more common brands, though this is of course dependant on the individual smoker as well.
Others
Djarum Specials, commonly called 'reds,' are the equivalent of a regular strength filtered cigarette and are wrapped with brown paper. Some feel that these cigarettes are an easier and lighter smoke than the blacks, yet others are more critical of the reds, as they have less clove in them and provide a less euphoric effect.
Djarum also offers a variety of other cigarettes, unfiltered premium-priced "Originals, menthol, and light varieties; a flavored line of cigarettes in cherry and vanilla. Djarum also markets the not widely available brands, L.A. Lights (and L.A. Lights Menthol), Djarum Splash, and Bali Hai all of which are kreteks.
Links
[1] Djarum's homepage (many languages)