pub fn print_chart(
film_id: &str,
paper_id: &str,
minutes: f64,
temp_c: f64,
) -> Result<PrintChart, Error>Expand description
The print curve, for a film, a paper and a development.
This is the scalar print’s curve, which is the one the model runs unless a caller asks for a spectral print. The x axis is the exposure the negative receives; a longer development moves the negative’s density up this curve.