محاليل الاظهار . بالجليسين ، محاليل الاظهار بالبارامينو فينول .التحميض والطبع ولتكبير

Presentation solutions. With glycine.

GLYCIN DEVELOPERS

This type of display solution is characterized by the following:

(a) The ability of solutions to remain for a long time without deterioration.
(b) These slow-appearing solutions result in fine grains with usually medium or below average contrast.
(h) Do not cause fog. on the negative. Glycine dissolves in water with difficulty, but it dissolves easily in alkaline solutions (such as solutions of sodium carbonate or potassium carbonate). Therefore, it is better to dissolve sodium sulfite first in the amount of water, then add glycine to it, then small amounts of carbonate and in successive batches with continuous stirring until it is completely dissolved. each of carbonate and glycine, then supplement the volume of the solution with cold water.

Presentation solutions » Paraminophenol,
PARAMINOPHENOL DEVELOPERS

The properties of this salt are similar to the properties of methol salt, but it is criticized for what it causes of dermatitis for some people with sensitive skin, in contrast to paraminophenol salt. Therefore, it is suitable for photographers who are harmed by the use of metol. Below are examples of the composition of this type of solution.