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.
859. The cleaned glass is first coated with our Slow emulsion and dried as usual; then each plate is examined for any possible defects. The perfect plates are returned to the coating-room, and there receive a second coating, but this time it is of our regular Extra Fast emulsion. They are then returned to the drying-room, dried, and the next day again examined. Those having no defects are then packed for the market.
861. Expose (time) for the shadows, time the exposure for the outer film; the under or slow film will take care of the high-lights. To get the best results these Non - Halation plates should be developed with a rather dilute developer - give the under film a chance to show its quality. Fix, and wash a little longer than usual.
1 fluid drachm
863. Stripping Film.
(Removing film quickly from glass.)
Both solutions can be used until exhausted. Place the negatives in solution A for a couple of minutes, and then place directly in solution B. After another couple of minutes raise the film with the finger from one corner; it will soon leave the glass. Very good in the case of broken negatives, for transferring the film onto another glass. In this case place the negative (before stripping) in a chrome-alum bath, made up 1 ounce chrome-alum and 20 ounces water, for one-half hour. Then wash well and proceed to strip. (Another satisfactory method is given in Vol. X, page 331.)