Sometimes when printing negatives with a glass carrier I notice faint rings of density spread all over my prints. I have noticed this also in my Leitz Focomat enlarger where the condenser comes in co
The problem is caused by Newton's rings, a light interference effect that shows up when two very smooth surfaces come in close proximity to each other causing light rays to constructively or destructively interfere with each other. Where there is constructive interference you will perceive a dark band on your print and a lighter, underexposed, band where there is destructive interference. The problem can be overcome to some extent by spreading anti-newton powder between the offending surfaces and using glass that has a slightly roughened surface. This is regularly used by makers of glass slide mounts. The powder can be obtained at Graphic Arts suppliers. I have never used it myself. To overcome this problem in your enlarger use anti-newton glass in the carrier or add an anti-newton glass spacer below the Focomat's condenser. There is a likelihood that the pattern etched into the anti-newton glass may show up as a faint texture in your prints however.
Ей, големи загадки. Добре, че човека в предния пост обясни за по-простите. Ще взема и аз да пусна тема "Тълкуване на фидеикомисарна субституция" и без уики само юристите ще знаят Но стига спам де. Вече е ясно общо взето за кво иде реч, така че ако някой му трябва, тук е мястото, щото човека подарява .
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