5. Dip a new cotton swab in the detergent. Then touch different areas of food coloring along the edge of the plate to see if the color will move again. The first time you touch the food coloring with ...

One way they can do this is to use a process called chromatography. In the activity below, you can try chromatography to separate colors in a mixture of food coloring! Place a coffee filter on a tray ...

What to know about Red Dye No. 40 and artificial food coloring used in thousands of food and drink products sold in the U.S.