Solubility is always a problem with dissolving solids into liquids. Besides further increasing the temperature of the water, you might be able to make the solids go into the water by adding an acid or base (I forgot if D-76 is acidic or basic.) Of course this would probably change the development characteristics of D-76. I know a biochemist who is also a B&W aficionado, and he measured the Ksp (solubility) of several developers. D-76 has a relatively low Ksp and requires a lot of water to dissolve the chemicals. Liquids are better in this regard.(posted 8388 days ago)Cheerio, Floren