On the subject of Anchell and Troop's level of warning on chemicals, I have collected some posts by Bill Troop about the VMI mercury intensifier because a have a set of negatives that would benefit from that type of intensification. In his posts, he warns that mercuric chloride is "caustic" and needs to he handled with care.
Now, as much as I very much admire the author's work and efforts to be helpful, I find it extraordinary that he should not issue warnings about the danger of mercury compounds and the need to dispose of them responsibly. I get the impression that he feels very competent in his own use of such chemicals (as do I), but he is remiss in not being more thorough at least in this case.
On the subject of hydroquinone, at least it degrades in the environment, and is safe enough to be used with normal precautions.