Blue Tinted Red Cabbage Dye

I. Material

Red Cabbage1/2 a head, ~400 g
Salt17.06 g
WaterEnough to completely cover cabbage in pot
Baking SodaUp to 60 g
Tools: Pot, Hot Plate, Glass Jar, Fine Mesh Strainer

II. Procedure

1. Finely chop cabbage into small pieces and place in a pot with salt.

2. Fill pot with enough water to cover the cabbage, bring it to a boil, then simmer for 30 minutes.

3. Using a fine mesh strainer, strain the liquid into a glass jar ensuring to press out any remaining liquid from the cabbage.

4. For a blue color, dissolve baking soda 10 g at a time into the liquid until the desired blue tone is reached.

5. Let cool, then seal the jar and store in the fridge until ready to use.

III. Results

Blue dye has high pigmentation. Color transfers to materials in a brighter hue than what they look like on their own. The smell is still very strong of cabbage and does transfer onto dyed materials. Dye does not keep on the counter, but will stay good in the fridge for around 3-4 weeks. If there is mold on the top, or the smell seems off, it is time to throw it out.