You would think that, but the green negs on the 1280 absorb more UV light than the orange negs. I have a UV densitometer, and I didn't believe it until I tested it myself. The green negs, IMHO, are FAR superior to the orange negs. I've done both, and now use the 'fake pyro' exclusively. Apparently the dyes have a lot more absorption than color alone would indicate.