I learned 3 things about emulsion making and use of gelatin. Gelatin is chemical permeable , its transparent and can be very hard. I think I found a chemical which could be used at homemade or factory made emulsions. It is transparent polyurethane foam. It can be loaded in to inkjet printer cartridges , can be jet very thin liquid layer , after waiting couple of minutes , liquid turns in to transparent foam and this foam could be loaded with silver nitrate with inkjet or hand pouring. Or other way is to jet silver nitrate in a solution with polyurethane at the same time , with different cartridges , or mix polyurethane liquid with silvernitrate and inkjet together. Other interesting thing is to use this process for printing paper. If we have a scanner and negative , we use them for electronic file and print a silver nitrate multidensity polyurethane image on to paper and than expose them with another negative. By the way we can adjust the emulsion composition for film at hand before expose. Best , Mustafa Umut Sarac Istanbul All rights reserved !