That particular roll did not have any unexposed frames. On most rolls, there is often a bit of unexposed film before the first frame, or after the last frame. I use those to adjust the color of the light source, but I do not keep those images once I have the color correct for that film. This needs to be done for every film type and for Kodak, for every roll. (Kodaks quality control was terrible.) All images have unexposed areas on at least three sides of the image, the fourth side is sometimes cut off exposing the light source (the developers cut the strips into four frame segments, and did not always do a good job of getting the cut between frames). I usually try to use that unexposed area to set my black point, but some frames are badly under exposed, and to get anything useful at all the black point needs to be significantly lower.
Those images were captured before I got any advice from this forum. I have not done anything with the cameras white balance, I had not been using that. I figured the cameras white balance would be useless since negatives have such a huge color bias built into them to deal with color films color sensitivity.