There's nothing wrong with the shape of the Time/Gradient curve. The shape depends on the film/developer/methodology combination.
One of the advantages of plotting a Time/Gradient curve is that you can extrapolate data. One potential problem of attempting to extrapolate too much above the available data is there's no information about when the film hits gamma infinity.
Looking at your curve, I'm not sure if the film will make a gradient of 1.00.
Last edited by Stephen Benskin; 08-24-2011 at 02:32 PM. Click to view previous post history.