B&W scan output files are a garbaged mess

[DavidJones]

I’ve been scanning 35mm slides for months with no problems. It did the multiple exposure and iSRD just fine. However when I went to scan B&W negatives it scanned and produced an output file without multiple exposure and iSRD. I then clicked ME and it did the multiple exposure but still no iSRD. I clicked iSRD and set the mode to automatic (Mark mode and the processing never finishes – Original mode is the same) and it does an infrared scan but the output file is garbage. Also when I scanned slides the processing took seconds. Now the processing takes over 2 minutes with garbage for output. What can be done to get it to scan B&W negatives?

Software: SilverFast Version 8.8.0r5
Scanner: Plustek OpticFilm 8200i
Film: Tri-X - NegaFix: Kodak – Tri-X – ISO 400
Output file format: Photoshop PSD

[LSI_Ketelhohn]

Dear user,

B&W film unfortunately can not be corrected using infrared scanning. the silver halide emulsion blocks the infrared beam. You can switch to the software based SRDx instead.

Kind regards,
Arne

[DavidJones]

Thanks Arne. - Does this this mean color negative film can't use infrared as well?

[LSI_Ketelhohn]

No color negative film is not effected by this. Unless it is an unusually dense emulsion or if there was an error during development (like the film not being washed correctly).