[alt-photo] gum speckling

[Willen, Matthew S]

Hi, Just wondering if someone might help me out here. My gum prints were coming out just fine, and then just a few days ago I started getting some very dramatic speckling on the prints. Using the same batch of sized paper (gelatin-glyoxal), and Potassium bichromate at 1:1 ratio pigment gum mix. Any suggestions or experience with this? Thanks,
Matt