This section is from the book "Modern Photography In Theory And Practice", by By Henry G. Abbott. Also available from Amazon: Modern photography in theory and practice: A hand book for the amateur.
Many photographers, thinking that the single toner is a combined bath, in which prints are fixed and toned at the same time, have condemned it without a trial. This is a mistake, as prints are toned first and then fixed. We will try and briefly explain the simplest and easiest manner of working Aristo Platino and Junior in the single toner.
The printing should be fully as dark as for double toning; print until the high lights are well tinted. Pay no attention to the shadows, no matter how much they bronze. Too light printing gives weak and bleached looking prints when finished. Prints should be washed in eight changes of clear water before toning, to thoroughly remove all free silver. Handle prints over in each wash water; letting prints lie in the ruuing water for half an hour without handling is not so good, as some prints will not thoroughly wash.