Loris, do you use EDTA in place of Citric Acid for initial clearing baths with VDB and Kallitypes? Is there a noticable difference on how they both clear or in the resulting prints?a chelation agent which is very useful if you're doing iron based alternative processes such as Pt/Pd, Kallitype, Vandyke, Agryrotype, New Chrysotype. It's commonly used as the primary "acidic" clearing bath (at 2-5% strenght). Na4 EDTA is/may be used later as secondary alkaline clearing bath (often mixing it with 2-5% Sodium Sulfite). You need an acidic first clearing bath with iron processes.