Originally Posted by
Ken Lee
Walter: Congratulations and thanks ! Your patience and persistence are helping us all.
Sandy: What does the wetting agent do, if it is applied in solution A ? Does it promote absorption of solution A into the film emulsion ?
If that is the case, would a longer pre-soak accomplish the same thing ?
Given that films have dyes which are removed in pre-soak, would it be helpful to perform more than one pre-soak, or to perform pre-soak with a large volume of water ?
What is the difference between a wetting agent (which breaks up surface tension in water), and something that changes the pH of the water ?
Walter - Are you sure the streaking in the first photo, isn't really a rare 'double twister" in the sky ? Also, could you share with us the Zone values for your photo ? I'm very interested in how things play out doing landscape photography. Did you use a filter for separation in the clouds ?