Various parts of plants such as roots,
stems, leaves, flowers, fruits and seeds are
used for dye extraction. Some plants may
have more than one color depending on
which part of the plant one uses. The color
yield and shade of the color a plant
produces vary according to time of the year
the plant is picked, how it is grown, soil
conditions, etc. Before extraction, the parts
of plants are collected and generally shade
dried in air or sun dried. Then the grinding is
carried out to break down the material into
very small pieces or powder using the
manual or electric grinding machines.
Optimum conditions of extraction are
determined by varying extraction parameters
such as type of solvents, time of extraction,
ratio between plant material and solvent,