red sweater "bleeding" question

[Night_Nurse]

I have a sweater that is red but it has a white collar and cuffs on the sleeve. It is machine washable and I've washed it numerous times (7 - 8 times) without incident. Last time I washed it the red coloring "bled" into the collar and cuffs and left them streaked pink. Does anyone have any suggestions on returning the collar to white? I know I could use bleach but I'm nervous it would run into the red part, especially since a lot of the pink is close to where the two colors/fabrics meet.
Thanks!

[elsie]

I might try something like oxyclean in cold water and if it comes out, try setting the red with vinegar

[cristeen]

I'll say good luck. Red that has redeposited is nearly impossible to remove without bleach - and even then it might not budge. I dyed a whole load that way, and they're still pink.