There may or may not be significant differences between the pictorial results of AA and HQ, but in respect to the above AA and HQ are very similar, at least for moderate pH levels.
My statement concerned the chemical properties of the two agents not the pictorial results although these are also different. Any resemblence between the two agents is superficial. For example, AA gives finer grain the HQ. As to the chemical properties the oxidation product of HQ, the monosulfonate, is also a devfeloping agent. This is not true for AA. Also AA produces little infectious development. There are other differences which I will not go into in this post.
Last edited by Gerald C Koch; 06-20-2012 at 09:59 PM. Click to view previous post history.
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.