Rainbow paper

Aim: To separate colours by using the process of chromatography.

Definition: Chromatography is a method of separating out materials from a mixture.Eg. blood, ink, drugs,

Scenario

A crime has been committed. The police have a signed cheque and a letter

from the same crime scene but it seems like the handwriting is different.

They have 3 suspects but not enough evidence. They need to know if the

letter and the cheque were written by the same person.

How do they tell if the pens used for both of these pieces of evidence are

the same?

Materials

1 filter paper
2 water
3 pencil
4 water-based-felt-pen
5 ruler
6 cup

process

Step 1: Get paper.

Step 2: Rule a line with the pencil 1cm away from the bottom of the paper.

Step 3: Draw 2 dots on the line.

Step 4: Fold the paper over the side of the cup.

Step 5: Pour a little bit of water in the cup.
Step 6: Watch.

Conclusion

Overall I think that this was an amazing experiment. It was fun and I can do this at home.It was fun to watch. Thank you all for reading my blog post. Have I nice day.