I took a bunch of photos and posted these two photos, each with white balance and exposure problems.
I think MG_8451 is the best, pictured below, but not perfect. Too much dark, not enough light.
The environment I was shooting in was AMS’s large cutting table in the center of the room. There were several halogen bulbs pointing at the subject, and a large cluster of florescent lamps overhead. My camera was set on a mini tripod that couldn’t be fully stabilized. I set the white balance to AWB and snapped a shot of the gray card. I set the custom WB to this profile setting, refocused manually and snapped a shot. The color seemed okay, but the histogram was off. I took a series of 10 more shots with white balance bracketing and exposure bracketing, trying to get the darks lower and the lights brighter, but none of them turned out as good as that first shot (MG_8451). The exposure was 1/100 with an F-stop of 7.1, ISO 400, shooting in Adobe RGB. Would it have made a difference to shoot at a higher ISO? Or were the lighting conditions such that attaining a proper exposure was out of the question?