On Oct 11, 2009, at 12:04 PM, Katharine Thayer wrote:
I have a demonstration on my website showing what happened when I
compared ammonium dichromate at saturated concentration vs ammonium
dichromate cut to 1/5 of saturated concentration, and exposed
accordingly (it took 5x the exposure to properly expose the
dichromate at 1/5 the concentration). The actual experiment
involved five different concentrations showing a linear
relationship between concentration and exposure, but I only showed
the two outside conditions to save space on the website. The 5x
diluted dichromate printed only four steps, vs eight steps for the
saturated concentration.