Quote Originally Posted by jcc View Post
I started out with Porta 160, for an hour-long exposure. Fine and dandy. Then I got home, and accidentally developed it with BW chemistry and temperature with ISO 400 film (was shooting with 3 different films during the trip, but stored exposed sheets in one box, and got mixed up in the dark notches felt similar).
I get much better results when I use the C-41 process on Kodak Porta rather than Black & White chemistry. YMMV