HOW TO: Christmas Chromatography

Materials:
Crayola Washable markers
Large coffee filters
Scissors
Spray bottle with water
Newspaper to cover your work area

What to do:
1. Cut fun Christmas shapes out of coffee filters.  Stars, angels, or snowmen are great ideas. 
2. Make large dots (about an inch in diameter) on the coffee filter shape using the washable markers.  Place the dots about an inch apart.
3. Place your coffee filter shape flat on a pile of newspaper and squirt it with the spray bottle until the entire filter is damp.
4. Wait five minutes and observe what happens to the dots you made!
5. Allow your filter to dry.
6. Punch a hole in your filter and tie a ribbon through to hang it on your Christmas tree.

What’s going on here?
Different colors make up ordinary ink. Colored dyes can be separated when dissolved in a liquid like water. This process is called chromatography. Different dye mixtures are used to make various inks. When you spray water on the filter paper it dissolves the dyes in the ink. The dissolved dyes move through the filter paper by capillary action and form color patterns.  Did some of your colors travel further on the filter paper than others?  Can you design an experiment and see? 


Attach a ribbon to make a pretty ornament!