Generally, dyes are the colored substances which have interaction to the substrate to which these are being applied. As an aqueous solution form, these dyes can be applied. Generally, these dyes require mordant to improve the fastness on the fibers.

Whereas, pigments, simply don't have any inherent likeness for the substrates. Pigments are also not soluble in nature.

Dyes are soluble in water. These dyes are used for colored clothes, basket reed and other porous materials. Pigments are the coloring substances and these are generally found in powder from that is insoluble in water. These don't migrate or bleed. For the insoluble nature, pigments are mixed with oil, water, etc. to make paint. Due to having different properties in dyes and pigments, these two are used in different effects. Dyes and pigments have different properties and are used to create different effects.

Natural dyes are the colors, which are obtained from plants. These dyes are applied on the substances with the help of minerals or metal salts. The metal salts are alum (aluminum salt), iron or tin (called mordants).

The following facts will tell you, why do we use Natural dyes:

• Most of the dyes, except Natural dyes are severally poisonous in nature. Due to this thing, when people use these dyes, then there may be a high risk of respiration disturbance to them.
• The working environment with natural dyes is very pleasant. This good working environment is very much conducive for the workers. The non-toxic, no poisonous and pleasant environment makes the working condition positive.
• The various wasteful materials which produces during the applications and manufacturing process of synthetic dyes, make the environment poisonous and polluted. So, in this respect also natural dyes are environmental friendly.

There is a certain method for calculating the required quantity of dyes that has to be used. For every 100gms of fabric weight, 5gms of dyes should be used.

Pale colored dyes can not be used for dyeing strong colored substances.

Dyes are unlikely to remove the stains. By coloring the stained area, the stain can be hidden, though this stained area will still look different from rest of the item.

The most dangerous kind of dyes are the basic dyes. These dyes have excellent dyeing performance on the acrylic fibers.