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Direct Dyes are another class of colors, one of the two sorts of colors that are blended in 'universally handy' colors, for example, Rit. (The other sort in the blend is an acid color, which won't stay in any cellulose fiber for long.) The shades of direct dyes are more blunt than those offered by fiber receptive colors, and the wash fastness is poor - expect anything colored with them to "drain" until the end of time. The one point of preference is that immediate colors might be more lightfast, that is, impervious to blurring in the light, than fiber responsive colors. The "immediate color" order in the Color Index framework alludes to different planar, profoundly conjugated sub-atomic structures that additionally contain one or more anionic sulfonate bunch. It is a direct result of these sulfonates aggregates that the atoms are dissolvable in water. Despite the fact that most direct colors still can be acquired in powder structure, it is progressively prevalent to get them as fluid concentrates.