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What is "Heavy metal free dyes" - Definition & Explanation

Heavy metal free refers to dyes that do not require the use of heavy metals to achieve the fixation of colors. Toxic heavy metals, such as chrome, copper and zinc, which are all known carcinogens, are commonly used as fixers in dyes. And, although most heavy metals can be removed from the effluent through wastewater treatment, this often does not occur.

Some other terms

Some more terms:

The raising of fibers on the face of the goods by means of teasels or rollers covered with card clothing (steel wires) that are about one inch in height. Action by either method raises the protruding...
An imperfection, characterized by a ridge or mark running in the crosswise or lengthwise directions of the fabric. Barrés can be caused by tension variations in the knitting process, poor quality...
An insoluble colorant is printed on the fabric as a paste or emulsion, heat cured and bound to the fabric with resins or binders. Allows for the printing of fabrics with fiber blends that would be...
Fiber reactive dyes are dyes used to color cellulosic and protein fibers such as cotton, rayon and soy. The dyestuff bonds to the fibers through a chemical reaction and does not require the use of...
Extruded yarn that has been subjected to a stretching or drawing process which orientates the long-chain molecules of which the yarn is composed, in the direction of the filament axis. NOTE: On...

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