Re: Potentially stupid pt/pd question
Also for DMax, Stouffer's sells a reflection, 21 step tablet that goes up to log 2.0 which can be used as described below with the two hole method. Best Wishes, Mark Nelson Precision Digital Negatives - The System PDNPrint Forum at Yahoo Groups www.MarkINelsonPhoto.com In a message dated 10/14/06 9:46:33 AM, ejnphoto@sbcglobal.net writes: Why did you go with the Vellum and not the RAG? When they say they are the same, did you ask about "whiteness", weight, ?? Whom at Legion did you speak with? Dmax can be compromised by not enough coating for a paper and by letting in soak in to deep. It may be a material that likes a lower humidity to start with for coating. The pH of the substrate is only one factor in coating paper. This paper may need to have a more direct air stream or heat applied to it during the drying process. How are you guessing .9? Black paper with two holes with one over the known value and one over the unknown value? |