Just finished my first trial with Azo and I realise how important a properly exposed dense negative is. I started out with a 200w bulb but moved on to a 60w bulb in order to keep the exposure times not too short (i.e. less than 15 secs). My thin negatives did not show as much detail as my denser negatives. But what a glow those dense negatives printed out. Beautiful prints and tone and detail and etc.. By the way, I used the two bath Moersch Amidol plus kit (the second bath being Catechol). Works very well indeed.