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When my group and I did this experiment we also used coffee filters to make flowers with the colour separation method.

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With many inks you will see that the colours separate apart and will show the two colours that make up the one colour you marked on the paper. This happened because the water climbs up the paper and hits the ink. That then causes the small particles of ink to spread out fast turning into the colours that make up the colour on the blotting paper.

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Cut out several 2 by 15 centimetre strips of paper. About half way down fold the paper in half and unfold it.
Draw a heavy felt pen line across the crease.
Repeat the process on several strips of paper with a different colour each time.
One at a time place the end of the paper strip in the bowl (you may need to lift the bowl up a bit). Guess what will happen to the ink on the paper.

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A sheet of blotting paper
A ruler
Scissors
Some coloured pens
A pencil
A dish of water

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I think that we will pull apart colours to see what the are made out of.

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What would happen if we could pull colours apart?