Before you comment that I should be using tannins if I want the colors to last in the sun, please check out my newest video:
Mordanting Cotton With vs Without Tannin - https://www.youtube.com/watch?v=dLbjJAaB4ZI
In this video I use 6 mordanting methods on cotton fabric and then dye the fabric pieces with 4 natural dyes. You will see the mordanting process and the results. I also performed a light/wash fastness test on the dyed fabrics to see how the colors last.
Blog post with photos of the results and descriptions of all mordanting methods: https://www.chromaticnatureclothing.com/2022/01/15/testing-6-mordant-methods-on-cotton/
Mordant ingredients I used:
Aluminum Acetate - https://www.chromaticnatureclothing.com/product/aluminum-acetate/
Aluminum Lactate - https://www.chromaticnatureclothing.com/product/aluminum-lactate/
Alum (Potassium Aluminum Sulfate) - https://chromaticnatureclothing.com/product/alum-potassium-aluminum-sulfate/
Sodium Acetate - https://chromaticnatureclothing.com/product/sodium-acetate/
Soda Ash - https://www.chromaticnatureclothing.com/product/soda-ash-sodium-carbonate/
Calcium Carbonate (chalk) - https://www.chromaticnatureclothing.com/product/calcium-carbonate/
Soy milk & vinegar - grocery store
Synthrapol detergent - https://www.misterart.com/crafts/textiles-dyes/dyes/sid~50446~/jacquard-synthrapol.html
The dyes I used:
Madder root - https://www.chromaticnatureclothing.com/product/madder-root/
Osage Orange - https://www.etsy.com/listing/622464471/osage-natural-dye?click_key=6fa5b4e0ed20c697e0f7715929e25624dcb2aa1f%3A622464471&click_sum=5278d416&ref=shop_home_recs_9&sts=1
Avocado skins - eat some avocados
Logwood -https://chromaticnatureclothing.com/product/logwood/
00:00 - What this is about
01:45 - Soy milk mordant method
04:03 - All the other mordant methods
10:44 - Dyeing the fabrics
12:56 - Light/wash fastness test
14:01 - Soy milk debacle
15:07 - Madder root results
19:22 - Osage Orange results
21:46 - Avocado skins results
24:14 - Logwood results
26:31 - My closing thoughts