Quote Originally Posted by Helen B
"If the step wedge densities were truly neutral it wouldn't make any difference."

If... the question of which mode to use would not arise. It appears from Sandy's measurements that some step wedges are not truly neutral. However, I agree with you that they should be neutral.

But they are not. I have quite a number of step wedges and every one of these has some kind of actinic filtration that results in a lower maximum density in UV mode than in Visual or Blue.