Nature of Dye
Contains:
Cochineal bugs (dried)
Soda ash (sodium carbonate) solution
Vinegar solution
Tri-sectioned petri dish
1-mL pipette
2 dropper bottles
Waste bucket
Rinse beaker
pH strips
Mini mortar and pestle
Product and dye cards
1/4" x 3" strips of uncoated-watercolor paper (bookmarks)
Marker and labels
Safety data sheets
In this activity, students prepare a dye, and then change its color by adding different mixtures. Students learn that color can be affected by the pH value of the dye. This program encourages participants to predict, observe, and share what they notice as they experiment with the dye.
http://nisenet.org/catalog/nature-dye
http://www.nisenet.org/chemistry-kit