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.
Slight Reticulation While Developing. Reticulation, or the covering of the tissue with a network of small lines, is usually caused by water too hot, or by a too sudden change in the temperature of the water in developing. The remedy is obvious. To avoid reticulation in summer add 100 grains of salicylic acid to the 100-ounce bath of bichromate.
Picture Covered With Shiny Round Spots. Caused by air being imprisoned between the tissue and the support-especially if rough paper is used. The transfer paper (etching paper, etc.) should be soaked in water for from one-half to two hours, according to its thickness, and just before the transfer, dipped into water at 110° Fahr. Considerable pressure with a soft support should be applied in a copying press, or under a fairly heavy weight, after transferring.
Innumerable Bright Spots Appear On Outlines Of The Transferred Print. The water used for soaking the transfer paper was too cold and too full of air, or the paper was insufficiently soaked. Use warmer soaking water, and apply strong pressure on the print when transferring.