The saga continues... and the new tone curve is now almost perfect too! 🤩 Kallitype has such small value ranges for both dark shadows and (even more so) in the upper highlights, so it's quite tricky trying to retain as much detail as possible in bright low-contrast situations. To retain more fine control, also chemically, I've started experimenting with 4x weaker/diluted contrast agent, which allows me to vary the number of drops mixed in and thus avoiding (to some extent) having to re-print expensive negatives for just tiny changes to highlights.

(Image credit and cc/ @pyrenaicus)

#AltProcess #Kallitype #Darkroom #PrintMaking #FineArt #LandscapePhotography

@thereisnocat Do you know the wavelength of your UV light? If your lows aren't getting dark enough in such a long time, it might indicate your UV light's wavelength isn't optimal. 365nm is supposedly best, but I found it harder to find decent options. So mine are 385nm (40W) and 395nm (200W) and the corresponding exposure times and distances are only: ~1:45min (4 inch) and ~2:40min (16-20 inch). For the latter, I initially also used a sheet of paper to diffuse the light more (for larger prints), but that extended the exposure time to ~17mins for not any noticeable difference...

(Btw. This is all for kallitype, but should equally apply for salt)

#AltProcess #Kallitype #SaltPrint #UVLight