My name is ****** and I'm NOT a pre-washer.......
However, I was top stitching a bright orange batik bag handle and looked down at my machine to see some of the dye had come off onto my machine. I'd used the same fabric for the lining and some of the bag panel was very light blue
. I carried on and completed the bag and put it in the washer with 3 colour-catcher sheets. The orange faded a little, but didn't bleed on to the other colours.
Still don't pre-wash.