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Blue colors were initially produced using minerals, for example, lapis lazuli, cobalt and azurite, and blue colors were produced using plants; for the most part woad in Europe, and Indigofera tinctoria, or genuine indigo, in Asia and Africa. Today most blue colors and colors are made by a synthetic procedure.
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BUY FROM SUYOG BIZ BLUE DYES
WHAT IS BLUE DYE Blue pigments were originally made from minerals such as lapis lazuli, cobalt and azurite, and blue dyes were made from plants; usually woad in Europe, and Indigoferatinctoria, or true indigo, in Asia and Africa. Today most blue pigments and dyes are made by a chemical process.
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light. Most materials selectively absorb certain wavelengths of light. Materials that humans have chosen and developed for use as pigments usually have special properties that make them useful for coloring other materials. A pigment must have a high tinting strength relative to the materials it colors. It must be stable in solid form at ambient temperatures.
REACTIVE BLUE An efficient sonophotocatalytic degradation of reactive blue 19 (RB 19) dye was successfully carried out using sulfur-doped TiO2 (S-TiO2) nanoparticles. • REACTIVE BLUE 21 • REACTIVE BLUE 25 • REACTIVE BLUE 38 • REACTIVE BLUE 71 • REACTIVE BLUE 72
DIRECT DYES Direct dye, also called Substantive Dye, any of a class of coloured, water-soluble compounds that have an affinity for fibre and are taken up directly, such as the benzidine derivatives. Direct dyes are usually cheap and easily applied, and they can yield bright colours. • Direct 199 Blue Dyes • Direct 86 Blue Dyes
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