Tim, If you haven't read the Unblinking Eye article on 777, do so.Originally Posted by k_jupiter
Para-phenyline-diamine is described as slightly soluble in water, alkaline solutions and sulfite solutions. Try dissolving the 7 grams in 100 - 200ml of 125F water - if the chunks don't dissolve well (and it may take a while), you will need to grind them up (mortar & pestle). Watch out, the stuff is toxic. Use gloves. See page 23 of The Darkroom Cookbook.
When mixing the 777 developer, the 7 grams of Metol should be dissolved first - add a pinch of sulfite to 500 - 600ml 125F water, then the Metol with constant stirring. After the Metol is dissolved, add the rest of the sodium sulfite.
Mix in the 100 - 200ml of Para-phenyline-diamine solution you made in the first step.
The 7 grams of Glycin should be dissolved last.