Common developers can be diluted to reduce the solvent effect of Sodium Sulphite. D-76 [or ID-11] for example, diluted 1+3 ends up with 3.25% SS by Cesar's numbers. You could experiment with even higher dilutions.(posted 8544 days ago)There is, of course, one other way to minimize grain in a given [silver image B&W] film: don't overexpose. Just enough exposure for adequate shadow detail.