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1.6

Major VersionM

by Manikandan S

Introduction

Colours can be separated by a process called chromatography, where water is drawn up using a wick and the colours separate at different radii as they interact on the wet filter paper.

Video Overview

    • Exercise caution while using scissors /paper cutter.

  1. Fold a filter paper, exactly, in half. The filter paper resembles a semicircle. Fold the semicircle shaped paper in half, again. Now, the paper resembles a cone. Cut a small portion of the pointed end of the cone, using scissors.
    • Fold a filter paper, exactly, in half. The filter paper resembles a semicircle.

    • Fold the semicircle shaped paper in half, again. Now, the paper resembles a cone.

    • Cut a small portion of the pointed end of the cone, using scissors.

    • Unfold the filter paper and observe the hole at the centre of the circle.

  2. Mark a dot 5 mm away from the hole. Similarly mark 4 more dots, forming an outer circle 5mm  away from the hole. All 5 dots should be approximately equidistance.
    • Mark a dot 5 mm away from the hole.

    • Similarly mark 4 more dots, forming an outer circle 5mm away from the hole.

    • All 5 dots should be approximately equidistance.

  3. Take an assortment of sketch pens (Black, Cyan, Green, Yellow, Orange). Mark dots using sketch pens on the previously marked pencil dots,  in following order: Black
    • Take an assortment of sketch pens (Black, Cyan, Green, Yellow, Orange).

    • Mark dots using sketch pens on the previously marked pencil dots, in following order:

    • Black

    • Cyan

    • Green

    • Yellow

    • Orange

  4. Fold a tissue paper as shown. Insert one end of the folded tissue paper into the hole  made on the filter paper. Insert the wick on the opposite side of the  marked dots.
    • Fold a tissue paper as shown.

    • Insert one end of the folded tissue paper into the hole made on the filter paper.

    • Insert the wick on the opposite side of the marked dots.

    • Fill 1/2 of a cut bottle (paper cup, container can also be used) with water. Dip the free end of the tissue paper in water.

    • The filter paper should rest firmly on the rim of the cut bottle / cup.

    • Ensure at least 1/4 of the tissue paper is dipped in water.

    • Keep the setup undisturbed.

  5. The filter paper starts to absorb water through the tissue paper. The coloured dots start getting dispersed into black, orange, yellow, green & cyan. Separation at 5 minutes.
    • The filter paper starts to absorb water through the tissue paper.

    • The coloured dots start getting dispersed into black, orange, yellow, green & cyan.

    • Separation at 5 minutes.

    • Separation at 10 minutes.

  6. At the end of  15 minutes, carefully remove the filter paper from the wick and allow it to dry.
    • At the end of 15 minutes, carefully remove the filter paper from the wick and allow it to dry.

    • Black separates into cyan, pink and orange.

    • Cyan moves to the periphery without separating.

    • Green separates into cyan and yellow.

    • Yellow moves to the periphery without separating.

    • Orange moves to the periphery without separating.

    • The separated colours may depend on the brand of the sketch pen.

    • Colours aren't getting dispersed - Make sure one end of the tissue paper is held tightly by hole in the filter paper. And the other end of the filter paper is partially dipped in water.

    • Pattern of the dispersed colours appear to be smudged - Make sure the dots are small and concentrated.

  7. Variation 1 - Replace water with acetone. Variation 2 - Replace tissue wick with a cotton wick. Variation 3 - By colour addition
    • Variation 1 - Replace water with acetone.

    • Variation 2 - Replace tissue wick with a cotton wick.

    • Variation 3 - By colour addition

    • For more variations, Go to Mixture - Chromatography (Variations).

Finish Line

Vishal Bhatt

Member since: 04/26/2017

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