Well by a stock solution I just meant that, say you want to use only a small amount (to develop a roll or two) at a high dilution--it's harder to be consistent when measuring such small quantities, so the manufactiurers will sometimes give you a 'stock solution' recommendation, so you can mix a fairly large amount with water, then dilute it further just before you go to use it.(posted 8776 days ago)But it doesn't sound like that was your problem (though I'm not familiar with the dilutions/developers you mentioned). What does the leader of the rolls look like? is there any difference in density between the leader and the frames themselves?