Quote Originally Posted by Francesco
You expose your step wedge onto the TMY (5 or 6 sheets perhaps) and then use your densitometer on the TMY (about 5 or 6 sheets developed for different times) after it has been developed in Pyrocat HD. The step wedge is not measured and hence does not have to be stained. Good luck!

Thanks Francesco!

I thought that I needed to measure my step wedge and enter the readings in the first column of WinPlotter and the program used that as a base to calculate the curve...

Or am I making this more complicated that it is :P