Onto the next challenge . . . What's an appropriate temperature for the pt/pd developing solution. I believe that we used a solution of potassium oxylate at the workshop I attended. (My memory might be a bit rough on this.) I know we kept it fairly warm, compared to Dektol. Also, what's a good way to keep the developer warm? I heard that some people use fish tank heaters. I checked these out, and they go up to about 92 degrees or so.