Looks about average to me. Measure the pH, and if it falls in the range of the graph I sent, use the k that you read from it to calculate the development time at 10 degrees higher or lower. One of the lines on the graph that PE sent should have about the same change in time for 10 degrees. Shift the time scale of the chart so that your favorite developing time is where the line through 20 C crosses the time scale. You could make a sliding time scale so you could use the chart like a slide rule. If you do this, let us know.
Originally Posted by Tom Stanworth