When the clothes are first colored they use too much dye, because using too little ruins a batch of clothes whilst using too much is only bad for the environment but good for making money. The surplus of dye can’t adhere to the fabric, so the first couple of times you wear/use and or wash the clothes the extra dye comes off.
I had a set of dark green bed sheets give off blue dye onto my white matrass cover. I didn’t wash them together, but the extra dye still came off in use. Obviously water will help the dye become mobile a lot, but it isn’t necessary. I’m not sure if the temperature has any effect at all.
No? Why would it only happen in non-cold water?
When the clothes are first colored they use too much dye, because using too little ruins a batch of clothes whilst using too much is only bad for the environment but good for making money. The surplus of dye can’t adhere to the fabric, so the first couple of times you wear/use and or wash the clothes the extra dye comes off.
I had a set of dark green bed sheets give off blue dye onto my white matrass cover. I didn’t wash them together, but the extra dye still came off in use. Obviously water will help the dye become mobile a lot, but it isn’t necessary. I’m not sure if the temperature has any effect at all.
I’ve only heard of/experienced colour bleeding in warm/hot water washes. I (thankfully) haven’t experienced colour bleeding with cold water washes.