If you're seeing white on your scans AFTER converting them to a positive, then you have dust in your camera or (WAAAAAAY less likely) no developing action in that tiny area. If they're PERFECT pinpoints, it could be air bubbles preventing the developer from reaching the film, but if they have any raggedness at all, it's dust in your camera at the time of exposure.
Thank you for the reply. For instance dirty fixer will result in white spots on scans (because the fixer goes black). Bath A has become quite discoloured but does not appear to be as full of deposits as my old fixer was. Then again these things are small so difficult to see. But any bits would be dark in colour, judging by how the discolouration looks. I am quite sure it is not "dust in the camera" or air bubbles.
If you're seeing white on your scans AFTER converting them to a positive, then you have dust in your camera or (WAAAAAAY less likely) no developing action in that tiny area. If they're PERFECT pinpoints, it could be air bubbles preventing the developer from reaching the film, but if they have any raggedness at all, it's dust in your camera at the time of exposure.
When fixer throws down a precipitate of sulfur which is white or black depends on the amount of silver dissolved in it. Very old fixer will form particles of sulfur that are coated with silver metal. For fixer that has not been used much the sulfur will appear white or a very light yellow.