This document describes chromatography, a method for separating substances based on their mobility in a stationary support. It outlines the materials needed and the steps to perform chromatography using ink on chalk and blotting paper. The process results in the separation of ink colors into distinct bands as water rises through the materials.

1. 056 CHROMATOGRAPHY
Chromatography is a method of separation of substances based on
their different mobility in a given stationary support.
MATERIALS REQUIRED:
Black, red and blue ink
Chalk piece (used for writing on Blackboard)
A lid about 6 cm diameter from a bottle or jar
A glass tumbler
A strip of blotting paper or filter paper
A stick from broom or a small twig

2. Ink spot
water
chalk
Mix a few drops of black, red and blue ink.
Place a few drops of this ink on a chalk about 5mm from the
thick end. Dry the chalk in air and place in the lid containing
water.

3. The ink spot should not be in direct contact with the
water. After some time water rises up the chalk and
the different colours are separated as bands

4. Take a strip of blotting paper and place a small drop of the mixed ink on it
about 1cm from the end. Dip the strip in water and fold and rest the other end
on a stick on the glass. Water level should be below the ink dot
As the water rises on the paper, the colours of the ink mixture are dispersed
as distinct bands