Friday, April 3, 2015
Growing and Harvesting Dye Producing Plants
Seed "Tapes" for first graders to plant
Yesterday I presented the chemistry lesson to the first grade class: how mordants work to adhere dye to wool. The metal salt forms an insoluable "lake" with the dye molecules.
And did you know that alizarin could replace cobalt in some batteries, thus making them non-toxic?
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