Any discharge white is going to soften up after washing, both in hand and blazing whiteness. The better the
penetration the whiter the white after the wash. I've got a number of discharge white shirts that are years old
and still acceptably white, especially considering that any significant coverage of white plastisol would have likely
started cracking and chipping by now, not to mention the whole comfort factor.
A lot will have to do with the garments as well. White has enough pigment off the belt to cover
up any less than stellar discharging , IE overdyes.