I has having a lot of problems with my previous test strips that used a single exposure, simultaneously through the Stouffer wedge and the aquatint screen. For this evening’s experiments I eliminated some variables. Instead of using the Stouffer wedge, I went old school and used a strip of cardboard to create a sequence of exposure times. I also increased the size of the exposed blocks to 1″ square and I added a fully exposed margin to simplify the plate wiping.