Alcohol doesn’t actually remove bleach stains, but it causes the colour of other parts of.

Bleach stains on black clothing. If any stains persist (they should only be small), you can then use the rubbing alcohol method to remove them. Add 1 table tablespoon of sodium thiosulfate for every cup gallons of water. If it is still in the middle of the discolored area, then you could try using a fine tip black pen to carefully color up to the butterfly, but not over it.

One if you are not the only person using the washer where you have. Let the vinegar sit for a few minutes and watch it work on your stain. Allow it to sit for 5 minutes.

Sodium thiosulfate counteracts the effect of bleach, but may not be effective on dark clothing or on an old stain. It will, however, prevent the bleach. The bleach must be attended to quickly.

Could be two different things that come to mind. Another solution that can neutralize bleach comprises of hydrogen peroxide and water. Check that the residue is gone.

If you use a concentrated bleach formula, use 2 to 3 tablespoons of bleach in 1 gallon of water. Within under 5 minutes, you should notice the stain becoming less visible. Rinse the area with cold water.

When this is done, you should then rinse your clothing in the wash. Use a wider tip pen for larger areas. Dilute 1/4 cup of bleach with 1 gallon of water.