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.
Surface Of Practice-Charts Tacky After Applying Retouching Dope. This is because you have applied too much dope, or did not rub it down sufficiently. If too much has been applied it is advisable to remove it with spirits of turpentine or a little more retouching dope.
Pencil Point Digging Holes In Retouching Chart. If you hold your pencil in an almost perpendicular position it is apt to dig holes into the chart. Follow carefully the instructions given in the lessons with reference to the holding of the pencil; in other words, hold it at the same angle as for ordinary writing - do not press on it too hard.
Lead And Dope Gathering On Pencil Point. This would indicate that too much dope was used, or the medium was too thick. Under such conditions, apply several drops of fresh dope and with a tuft of cotton rub quite hard. This will remove the old dope and give you sufficient tooth with the new to take the lead nicely. Occasionally wipe the point of the pencil on a piece of cloth, to remove the powdered lead and dope which may adhere to the pencil.
Extreme Point Of Pencil Breaking. This is due to bearing on the pencil too heavily. Use a light touch, light enough so that there will be no danger of the point of the pencil breaking.
Unable To Vary The Weight Of The Pencil Stroke. With continual practice on the charts, by carefully balancing the pencil between the thumb and forefinger, and by constantly practicing the wrist and finger movements you will readily overcome this difficulty. Practice the movements given in Lesson II and in a very short time you should be able to apply as much or as little weight as is necessary.
Removing Blemishes In High-Lights And Shadows. The blemishes in high-lights as well as in shadows are of different grades of transparency. In high-lights they may appear only
slightly lighter than the surroundings, or they may appear almost like clear glass. Those that appear like clear glass will need a great deal of filling in, while those that are only slightly transparent may be filled in with a very light touch. In the shadows you must at all times work lightly, as it will take only a little lead to fill the blemish and make it match the surroundings.
Lead Will Not Take. This is because you have not applied enough retouching dope, or you have removed too much of it with your cloth or cotton when rubbing it with a circular motion. Apply the retouching dope again and do not remove quite so much of it.
Lead Takes Too Readily. This is because you either apply too much retouching dope, or do not remove enough of it when rubbing with a cloth or cotton. Remove your retouching dope and again apply, but do not use quite as much.