Hurumanu-Rainbow Paper

Aim: To separate colors 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?

Rainbow paper

Materials;

1. Cup

2. 2 felt pens

3. a ruler

4. a pencil

5. chromatography paper

6. Water

Process:

Step 1: Use a ruler to rule a line 1 cm from on the bottom of the chromatography paper with a pencil.

Step 2: Use two different colored water-based felt markers and add two reasonable sized dots.

Step 3: Place your paper into the cup before it touches the bottom of the cup.

Step 4: Bend the paper so it doesn't fall in.

Step 5: Add your water.

Step 6: Watch the color spread up the paper.