I wonder what the alternative options are if I want to make an ambro/tintype with the use of liquid emulsion, other than the use of Rockland's reversal developer (or the whole tintype kit). I'm searching on the web for some time now, but find it very hard to find any information how to get a positive with the use of liquid emulsion. The emulsion I can get in my country is Maco/Rollei Black Magic (variable contrast), which seems a very recommended high-standard product. So, let's say that this is the emulsion I want to work with, in combination with a digital transparency/contact print process on black metal or glass, get the final image in positive, while the blacks are transparent, and the lights are semi-to opaque. The final image should have a good overall density, strong blacks, good highlights and good greyscale range. (No strong black/whites without anything in between.) Thanks.