Sulfur Black BR ndi mtundu wina wake wa utoto wakuda wa sulfure womwe umagwiritsidwa ntchito popanga nsalu popaka thonje ndi ulusi wina wa cellulosic. Ndi mtundu wakuda wakuda wokhala ndi mawonekedwe amtundu wapamwamba, womwe umaupanga kukhala woyenera kupangira nsalu zomwe zimafuna mtundu wakuda wokhalitsa komanso wosasunthika. Sulfur wakuda wofiira ndi sulfure wakuda bluish zonse zolandiridwa ndi makasitomala. Anthu ambiri amagula sulfure wakuda 220% muyezo.
Sulfur Black BR imatchedwanso SULPHUR BLACK 1, yomwe imagwiritsidwa ntchito pogwiritsa ntchito njira yotchedwa sulfur dyeing, yomwe imaphatikizapo kumiza nsalu mu bafa yochepetsera yomwe ili ndi utoto ndi zina zowonjezera mankhwala. Akadaya, utoto wakuda wa sulfure umachepetsedwa ndi mankhwala kuti usungunuke ndiyeno umagwirizana ndi ulusi wa nsaluwo kuti upangike mtundu umodzi.