Chromotography
Method:
1.) Cut a piece of filter paper 10cm X 2cm.
2.) Cut a small cross in the center of another filterpaper.
3.) Draw a ring, with a radius of 2cm, around the center with a koki pen. The line should
be 2mm thick..
4.) Roll up the rectangular piece of filterpaper and stick it through the hole of the
filterpaper you have just drawn on.
Roll of paper
5.) Fill the Petri dish with water.
Other filter
6.) Place the filter paper on the petridish so that
the roll is in the water.
Observe after ten minutes:
Try different koki pens
Koki ring