Did the test again. FRESH chemistry. Film: Very expired Fuji 500D.

Test [1]
HC110/B 4oz + E6 Color Developer 4oz. Developed at 100 degreesF for 3 minutes. Wash then BLIX for 5 minutes 100 degrees F.
Results in B&W negative.

Test [2]
HC110/B 8oz at 70 degreesF 6 minutes.
Wash
E6CD 8oz at 70 degreesF 6 minutes.
Wash
BLIX at 70 degreesF 6 minutes.
Results in Color Negative.

These are unedited raw scans for your viewing pleasure. There is nothing ideal about any of this, so put away the flame throwers. Just noting what happens when B&W and color developer is mixed or separate during processing.

HC+CD.jpgHC-THEN-CD.jpg