I just printed some color negatives on MG IV in Dektol. They were medium format. I had to use around grade 4, but the images ended up looking surprisingly good. I was a bit chagrinned, in fact, since I typically would have made them with B&W. Anyway, they needed the added contrast, but were otherwise normal. I always use Dektol with the fiber base MG, but at 1:3, and two minutes or sometimes three. The RC stuff gets one minute, so that is why 1:4 is okay with it.(posted 8618 days ago)