WebTheir appearance made me think of dichroic fog. I did try pure fixer on one of them, but that did not remove it. I might try Farmer bleach, but that I can only apply to the non emulsion side (if it works at all). ... (I quote) Dichroic fog may be caused by excess of sulfite in a fine grain developer, by hypo contamination of the developer, by ... WebThis is a measure of the base plus fog density. A low density value is desirable. An increase in the base plus fog density can be caused by over processing a film. Speed: CONTENTS A single exposure step that produces a film density of about 1 density unit (above the base plus fog value) is selected and designated the "speed step."
Dichroic fog - definition - YouTube
WebThe stains are dichroic fog caused by fixer on the fingers contaminating the prints before or during development. You can't have unfixed developer Gem Developer traces diffuse out during the stop bath and fixing stage but there's no interaction unless the fixer is neutral or alkali. Washing fingers in the rinse/wash water's not sufficient, they need a good wash or … WebWhat is the cause of dichroic stains? Improper squeezing of processing chemicals from film: What is the cause of guide-shoe marks? Improper position or springing of guide shoes in turn-around assembly. What is the cause of pi lines? Dirt or chemical stains on rollers: T/F: Dichroic stain is a type of chemical fog. True flowers perennials pictures
Dichroic spots
WebCap you fused glass dichroic on dichroic glass layers with a clear glass but make sure it is slightly larger than the based glass. If you made the mistake of stacking two pieces of … WebDichroic fog is a deviation in processed film, that appears as a red or green cloud and caused by an imbalance of chemicals in the developer. - created at ht... Chemical fogging can occur at the processing stage when old or spent chemicals are used, chemicals are used in the wrong sequence, there is inadequate washing between processing stages or inappropriate chemicals are used. Because of the wide range of causes, the effects can be diverse ranging from coloured streaks and blotches through to the lack of an image or a totally black image. The most common cause is the use of old or spent chemistry which often results i… green blue yellow red personality