D-76H is a hydroquinone-free variant of D-76 (the most commonly used film developer out there). Leaving out the hydroquinone is a good thing, as it isn’t the healthiest stuff around (it is a suspected carcinogen). Re-usability is said to be inferior to D-76, but it keeps longer without pH increases, and is easy to mix. Developing times and contrast indices are supposed to be identical to D-76. I hope to try it very soon.

D-76H

Start with 500 ml distilled water at 50C
2.5 g metol
100 g sodium sulfite (anhydrous)
2.0 g borax
Make up to 1 L with distilled water

The best online information about D-76 can be found at Ryuji Suzuki’s wiki about it.

I recently stumbled on a link to a treasure trove of B&W photography articles from the New York Institute of Photography. I’ve only had a cursory look through them so far, but they seem great. One of the authors is Bernhard Suess, who’s the author of a couple of excellent books on B&W photography. Definitely worth a look.