Rwear, see if the same thing happens if you spray with water and wipe. Or alcohol in solution. Or ammonia in solution. (This is what's known as a controlled experiment.) It's the elbow grease that's important, along with the universal solvent, H2O. If the bleach had been concentrated enough, and left on long enough, to cause the whitening you saw, then the colors would have been faded to a similar degree. You simply dissolved, suspended, and absorbed some of the accumulated scum. This will almost always clean the jacket effectively enough for government work. Again I reiterate that is not necessary to also try and "kill" mildew if present, which obviates the "need" to play with bleach. I find it a little surprising, though maybe that is naive on my part, that you would have posted twice on this subject disagreeing with me (your perfect right, BTW) and promoting your bleach regimen instead, when you apparently had no prior experience doing this procedure. I admire your eventual forthrightness about this, but question your impulsiveness OTOH. Everybody is entitled to their opinion, no matter what their experience level, but it's wise and honest to make clear exactly what is opinion and what is known. And in that spirit, let me make it crystal clear that every opinion I have expressed above about the use of effectively significant concentrations and quantities of chlorine bleach in the aid of cleaning record jackets is based on everyday common sense and life experience with its use on items *other* than record jackets, because I am not crazy enough to use my collection to carry the experiment you detail above to its meaningful and logical conclusion (nor have I had the need to)! Cheers, Z.