Black and White Conversion Tool - expert advice needed

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i'm trying use photoshop b&w conversion tool simulate film curves. have spectral sensitivity of films such tri-x plotted on wavelength. seems b&w conversion tool nicely resembles color wheel. information can translate red - yellow - green - cyan - blue - magenta slider positions wavelengths, @ least approximately. nice know exact wavelengths approximation work. problem don't know percentages on sliders represent. if normalize film sensitivity mid spectrum green or yellow how sensitivities translate percentages? linear relationship or log? i'm trying understand math behind percentages in dialog.

i'd appreciate hoping here familiar workings behind tool.

thanks in advance.

detlef



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