Aaron:(posted 8520 days ago)It definitely is not a problem with pinholes. Pinholes are small ruptures in the gelatin material resulting from outgassing. This is usually caused when using a developer containing sodium carbonate. The carbonate reacts with the acid stop bath to put out a gas very rapidly, but it could also react with an acid fixer. You don't mention the developer you used, but most developers today do not contain sodium carbonate. Anyway, if you were having a problem with pinholes, you would be getting clear holes in the emulsion instead of dark spots. So, pinholes are definitely not the problem.