This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
White Spots. These are generally produced if bubbles of air are allowed to remain beneath the paper while floating. Raise the corner of the paper as soon as it lays flat on the bath, and remove these air-bells by touching them with a match or toothpick.
Tear Drops. These are small blots of silver solution which adhere to the paper when each sheet is not blotted carefully before hanging up to dry. This may also occur if the paper is not rubbed with the cotton before floating, for if the paper should be very dry, tear drops will form. By rubbing over the surface before silvering, the friction has a tendency to electrify the surface so the solution acts evenly.
Paper Not Taking The Silver Solution. This is a certain sign that the paper is too dry and should be placed in a damp place for a few hours before silvering. Always keep the paper in a cool place.
Paper After Sensitizing Discolors Quickly. This is due to the fact that the paper was floated too long.
Prints Have A Dull And Sunken Appearance. This may also be caused by allowing the paper to float too long in the sensitizing bath.
Shadows Bronzing Quickly. Where the shadows bronze quickly before the print is completely printed is the result of floating the paper too long, or using too strong a silver solution.
Weak Prints. Weak prints are generally due to insufficient sensitizing, not allowing the paper to float long enough, or using too weak a bath.
Paper Appearing Greasy. Insufficient sensitizing, or the silver bath too cold.
Foxy-Reddish Tones. This is often caused by floating the paper too short a time in the sensitizing bath, and by insufficient fuming.
Paper Curling While Floating. Either the paper is too dry or the albumen film is too tough. Remedy: If the paper curls, breathe on the parts that are curling up and they will lie down flat again. If much trouble of this kind is experienced, keep your albumen paper in a box containing a dampened sponge.
Stains On Parts Of The Sheet Of Paper. This will occur if the paper is allowed to come in contact with any unclean substances. Dark stains on the back are caused by silver solution running over on the back.
Small Dark Spots Or Specks. This is mostly caused by small metallic pieces of dust imbedded in the paper. They can generally be removed with the sharp point of a knife.