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Carbon black ( Color Index International, PBK-7) is the name of a common black pigment, traditionally produced from charring organic materials such as wood or bone. It appears black because it reflects very little light in the visible part of the spectrum, with an albedo near zero.
Tahitian pearl. Tahitian pearls in bulk. The Tahitian pearl (or black pearl) is an organic gem formed from the black lip oyster ( Pinctada margaritifera ). [1] These pearls derive their name from the fact that they are primarily cultivated around the islands of French Polynesia, around Tahiti. [2]
Black money scam. The black money scam, sometimes also known as the "black dollar scam" or "wash wash scam", is a scam where con artists attempt to fraudulently obtain money from a victim by convincing them that piles of banknote-sized paper are real currency that has been stained in a heist. The victim is persuaded to pay fees and purchase ...
Iron gall ink. Iron gall ink (also known as common ink, standard ink, oak gall ink or iron gall nut ink) is a purple-black or brown-black ink made from iron salts and tannic acids from vegetable sources. It was the standard ink formulation used in Europe for the 1400-year period between the 5th and 19th centuries, remained in widespread use ...
Dye. Drying colored cloth. Chemical structure of indigo dye, the blue coloration of blue jeans. Although once extracted from plants, indigo dye is now almost exclusively synthesized industrially. [1] A dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do ...
65589-70-0. 10597-46-3 (hydrochloride) Alcian Blue 8GX. Alcian Blue. Ingrain Blue 1. 74240. phthalocyanine. 75881-23-1. Alcian yellow GXS.
Scleral tattooing is the practice of tattooing the sclera, or white part, of the human eye. Rather than being injected into the tissue, the dye is injected between two layers of the eye, then gradually spreads. The process remains uncommon due to professionals' discomfort performing the procedure [1] and is illegal in the American states ...
Teeth blackening. An Akha woman from Myanmar with blackened teeth. Teeth blackening or teeth lacquering is a custom of dyeing one's teeth black. It was most predominantly practiced in Southeast Asian and Oceanic cultures, particularly among Austronesian, Austroasiatic, and Kra–Dai-speaking peoples. It was also practiced in Japan prior to the ...