Fabric is Discolored Along Folded Edge

By

PIKKA

Okay. I'd plan on washing fabric up to 3 times.

First time, just wash with a small amount of detergent in cool water in washing machine on gentler cycle. No hot water, no dryer. Just take it out and look at it.

Second time, if you have gentle soap like handmade, or Ivory, grate some soap into hot water, let it mostly dissolve, and continue cycle with cloth added on warm or hot cycle. Again,
take it out and look at it, and don't put in dryer. But when it gets ready to rinse put in 1/2 cup white vinegar to get out the soap. When that cycle is done, you can see if your efforts have done anything. If it now looks okay, well and good.

If not, repeat second type washing, and what you have at end is what's possible.

You can air dry or dryer dry. I'd let it air dry to get a very close look at it in bright light when it's dry, because when it's wet, you can't always be sure of the final result, but heat drying it will set it at the stage it is.