Ilford FP4+ in HC110 tested. From way too contrasty to normal.

[Stephen Benskin]

This has been interesting to read. I have nothing to contribute, but I would like to understand some of the experimental technique -

For those here using densitometers and compiling contrast curves, what is the method for applying a known exposure to the film calibrated to the desired units? Is it done by photographing a chart under known/measured lighting conditions, or some other way?

By using a step tablet and preferably a sensitometer.