When you over develop film you increase density in shadows, midtones and highlights.
True but they don't come up equally... density in the shadows (where film speed is measured) only increases a tiny bit, density in the mid-tones increases more, and density in the highlights increases even more.
Mark Barendt, Ignacio, CO
"We do not see things the way they are. We see things the way we are." Ana´s Nin