Opticallimits

SLR scanning for black and white negatives is something quite easy to do. However scanning for color negatives  I fell on another problem: white balance

I shot the pictures in RAW using daylight LED then inverted the colors to get ....blue pictures. I then used the adobe camera RAW in Photoshop and use click white balance on a white subject then applied the settings to all the JPG pictures.

Is there any easier way to do it ? 

Instead of a white subject, you can also go for the frame numbers on the edge of film. I usually just tweak the levels though. Go to separate RGB levels and manually put the end points to the ends of histogram, that usually gives a pretty good color balance. After that, I simply tweak it further if necessary.