WTB Cheap safelight
A really bad safelight could pass that test. Emulsions have a threshold exposure below which they are not sensitive but once it is exceeded then tiny amounts of additional exposure that wouldn't have exceeded the threshold will cause further density. The symptoms will be fogged (not always obvious except by comparison to a print done in darkness) highlights while borders are still white. Preflash your test paper with no negative in the enlarger for a light gray overall (about zone VII to VIII in zone terms) then use that method.
Originally Posted by John&Tessa