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Bluing, laundry blue, dolly blue or washing blue is a household product used to improve the appearance of textiles, especially white fabrics. Used during laundering , it adds a trace of blue dye (often synthetic ultramarine , sometimes Prussian blue ) to the fabric.
Indigo dye is a dark blue crystalline powder that sublimes at 390–392 °C (734–738 °F). It is insoluble in water, alcohol , or ether , but soluble in DMSO , chloroform , nitrobenzene , and concentrated sulfuric acid .
Powder blue is a pale shade of blue. [2] As with most colours, there is no absolute definition of its exact hue. Originally, powder blue , in the 1650s, was powdered smalt (cobalt glass) used in laundering and dyeing applications, and it then came to be used as a colour name from 1894.
Ultramarine is a deep blue color pigment which was originally made by grinding lapis lazuli into a powder. [2] Its lengthy grinding and washing process makes the natural pigment quite valuable—roughly ten times more expensive than the stone it comes from and as expensive as gold.
Dyeing is effected by heating the fabric in a solution of an organic compound, typically a nitrophenol derivative, and sulfide or polysulfide. The organic compound reacts with the sulfide source to form dark colors that adhere to the fabric. Sulfur Black 1, the largest selling dye by volume, does not have a well defined chemical structure.
A blue chambray fabric, made of a blend of linen and cotton, with blue warp and white filling. Cambric was originally a kind of fine, white, plain-weave linen cloth made at or near Cambrai. [10] [9] The word comes from Kameryk or Kamerijk, the Flemish name of Cambrai, [10] [9] which became part of France in 1677. The word is attested since 1530 ...
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