I would suggest using a alkaline fixer. These are more gentle than acid style fixers. water 750mls. 250 grams Sodium Thiosulfate. 15 grams Sodium sulfite. 10 grams Sodium Metaborate. then water to 1 litre. Fix for about 10 minutes. When coating your paper with Albumen I suggest double coating and using Isopropyl Alch to help dry. I have found this leads to better coating. The other option is to try Salt printing. A few less steps. The image is in the paper not on it. It almost looks like a sepia watercolour when untoned.