The shoulder of the D log E curve is controlled by

Question

Quizplus · Accepted Answer

The shoulder of the D log E curve is caused by the gradual reduction of the concentration of hydroquinone in the developer solution. Hydroquinone is gradually oxidized into quinone, which is an ineffective developer. The addition of phenidone can help prolong the activity of hydroquinone but does not control the shoulder. Sodium carbonate is an alkaline agent that controls the speed of development, but it does not affect the shoulder. Potassium bromide is a restrainer that prevents excessive fog, but it does not control the shoulder.

The Shoulder of the D Log E Curve Is Controlled