In the classification of the dye seller Dharma Trading Co., a colour made by mixing two or more pure colours (colours made of the molecules of a single dye only). In ice dyeing with reactive dyes, such a colour can separate into its component pure colours as the ice melts; this is called colour splitting.
mixed colour (blend of dyes) ・causesin tie-dye, one or more component colours may bleed along the edges where the dye was appliedcontextual
Scope: Tie-dye with Dharma fiber reactive dyes
Says tie-dyers using mixed colours may occasionally see component colours bleed along the edges, causing unintended mixing; to keep sharp lines, add a little Super Clear or a tiny amount of sodium alginate to the mixed colours.
mixed colour (blend of dyes) ・found inunlike an inorganic pigment such as carbon black, no dye or organic pigment giving black from a single compound is known; actual black colorants are said by this manufacturer to consist of a mixture of two or more differently coloured compoundscontextual
Scope: A technical explanation by a manufacturer of dyes/organic pigments for plastic/resin colouring; it does not name fibre-reactive, direct or acid textile dyes specifically.
Explains that while carbon black (an inorganic pigment) shows black from a single substance, no dye or organic pigment giving black from a single compound is known, and that actual black colorants consist of a mixture of two or more differently coloured compounds -- noting that markets and literature sometimes present them as a single structure when in fact they are multi-component.
Source: 配合染料の魅力 （オリヱント化学工業株式会社） ・「カーボンブラック」の項（末尾）と「一般的な黒色染料」の項 ・manufacturer statement ・ checked against the source by AI
mixed colour (blend of dyes) causes Base colour ("soko-iro") of a black colorantcontextual
Scope: A technical explanation about black dyes for resin colouring, by the manufacturer Orient Chemical Industries.
States that reducing a black dye's concentration reveals its "base colour", which does not become neutral grey but instead takes on the hue of its dominant colorant component, such as brown or dark green.
Source: 配合染料の魅力 （オリヱント化学工業株式会社） ・「一般的な黒色染料」の項 ・manufacturer statement ・ checked against the source by AI
mixed colour (blend of dyes) ・found inDharma carries five fiber-reactive black dyes, said to differ in cast when vat/tub dyed (some blue-purple, some blue; tie-dye edges are additionally noted as blue-green, pink, etc.); for the deepest black in tie dye it recommends either its newer "Raven Black" alone, or mixing two of the other blacks (#44 and #300) half-and-half.contextual
Names five fiber-reactive black dyes, describes each as vat/tub-dyeing to a different cast (bluish-purple, blue, etc., with tie-dye edge colours additionally noted as blue-green, pink and so on), and recommends either the newer Raven Black or a half-and-half mix of #44 and #300 for the deepest black in tie dye.
Source: Dharma's Fiber Reactive MX Dyes FAQ （Dharma Trading Co.） ・「Which is the best fiber reactive black dye to use?」の問い ・manufacturer statement ・ checked against the source by AI
mixed colour (blend of dyes) ・propertyBlack is described as a "tough colour" requiring a lot of dye, and in tub (vat) dyeing is said to need double the usual amount of salt.contextual
States that black is a tough colour requiring a lot of dye, and that in vat dyeing the amount of salt needs to be doubled.
Source: Dharma's Fiber Reactive MX Dyes FAQ （Dharma Trading Co.） ・「Which is the best fiber reactive black dye to use?」の問いの最終段落 ・manufacturer statement ・ checked against the source by AI
mixed colour (blend of dyes) is a type of a colour made by mixing two or more pure colourscontextual
Scope: For Dharma fiber reactive dyes
Says that colours without a Colour Index code or MX number after the name are mixes of two or more of the pure colours.
Are reactive, direct and acid black dyes single-colorant blacks, or blends of several dyes?
We confirmed, from a resin-dye manufacturer's (Orient Chemical Industries) explanation, the general statement that black dyes are typically mixtures of several colorants rather than single compounds -- but could not find a fibre-dye manufacturer's technical source stating explicitly how black is composed within each textile dye class (reactive, direct, acid).
If a mixed-colour dye powder is separated by paper chromatography at home, does it split into components at different speeds, the way a water-based pen ink did in a published paper-chromatography experiment?🧪 testable at home
Spotting a small amount of a mixed-colour reactive dye (black, grey, brown, etc.) onto paper and developing it with water, or a water/ethanol mixture, might let one see at home how many dye components it splits into, and in what order and speed.
manufacturer statement ・ 
checked against the source by AI