Even flatbeds which are more document scanners, when they have the light source for transmitted light scanning, can neutralize the orange color automatically when you select 'color neg' as what is being scanned.
Way back when, I had a scanner that stated that it had the resolution to scan negatives, but it needed a special negative carriage with a reflective back. I never bought the special carriage, so I have no experience.
Does anyone have experience using a flatbed document scanner, or a All-in-one machine. It would be interesting to know how it can be done, when you are not using a dedicated scanner.