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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:

Woven and non-woven material used underneath the item or fabric being embroidered to provide support and stability. Can be hooped with the item, or placed between the machine throat plate and the...
Fabrics that contain fluorescent materials in order to make the wearer visible in dim and dark lights. These fabrics have the ability to reflect on-coming lights, which cause them to glow in the...
A double-knit fabric in which the rib wales or vertical rows of stitches intermesh alternatively on the face and the back of the fabric. Rib knit fabrics have good elasticity and shape retention,...
A trapezoid-shaped window treatment usually at the top of the window. Can be pleated or shirred and is often paired with jabots. A continuous or scarf swag is drape over a pole and on the left and...
These weaves give the characteristic single-diagonal lines noted on the face of the cloth. There are twice as many threads per inch in the warp than there are in the weft. Because of the twist in the...

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