Dope dyeing is a production technique use for dyeing synthetic fibers such as acrylic, nylon and polyester. In the dope dyeing technique, color pigments are added to the polymer solution while it is still liquid, before the yarn is produced, making the color a part of the fiber. This ensures less color variation between batches compared to traditional dyeing techniques. Traditional dyeing of synthetic fibers requires a two-step process – in the first step, the fibers are produced without color; and in the second step the color is applied to the surface of the fiber. In the dope dyeing technique, one step is eliminated. This reduces water consumption by up to 90% and the use of traditional chemicals by 98%.