How do I make DIY 'color catchers' for the laundry?

What a good question, I use shop bought ones all the time. I did a quick google search and found this post, but I would want to test them out before risking my laundry! https://www.onegoodthingbyjillee.com/make-your-own-color-catchers/

1. Start with pieces of white cloth. They can be old towels, wash cloths, flannel or something like that. ...
2. Dissolve 1 tablespoon of washing soda into one cup of hot water.
3. Dip the cloths in the soda/water and wring out. ...
4. When they're dry, store your homemade color catchers by washer so they're handy when you do laundry.

Not to discourage your DIY efforts but I've functioned my whole life without them and never had a color bleed. One way to prevent this issue is to use cold water most of the time except when another temperature is needed. (Ex.: recently I spilled hair oil in my suitcase and I soaked the items in hot soapy water to release the oil.) I have DIY my laundry powder for years and never had a problem, I pre treat stains with the same DIY powder made into a cream and rubbed into the stain. I also found a pod 'Dropps' that is formulated for cold water and my mom is using the 1/2 load size for all her laundry.

I've never used them either. Sort your clothes before washing, and use cold water for bright, dark and red and you will be fine. Wash like with like. Some things can't be washed (dry clean only) and I rarely buy them, not just because of the expense, but, I don't like the smell. Use a detergent that works well in cold water.

A nice video about it. https://www.youtube.com/watch?v=HwwndibesNo