If you replenish the used developer with an adequate amount of fresh developer you will not get stain. I find that replenishment at about the rate of 100 ml of solution per one print of about 8X10 size through the developer is sufficient to achieve this. However, the actual amount may vary with the actual paper in use so if replenishment at the rate of 100 ml per 8X10 does not prevent staiing, then double or triple the amount. And and once the deveoper gets so saturated tht it stains stain I would suggest replacing about 50% of it.
Originally Posted by cjarvis
Another way of working is to simply always use fresh solution, using the mininum amout of developer needed to develop a printing without staining. I estimate this to be about 100ml for an 8X10 print. However, because of the small quantitiy of developer involvbed you probably need a flat bottom tray for this type of development.