Unmitigated Effects

How does the Dr. Ph. Martin's Hydrus behave when it is the only thing on the page? The test on  the left is with cobalt in four lines on a wet pieces of Arches. The test on the right was executed with Payne's Grey in a squiggle fashion.
Some of you might wonder why I approach things with the idea of testing & scientific inquiry. First, my education is in printmaking.  While I have not pulled a print in awhile the method of testing your acid & mixing your ink, along with the traditional practice of different states for a plate are still very much a part of my modus operandi. Second I had a great science teacher in high school, for three years in a row. She expected nothing less than perfection & while I often fell short, her strive for excellence meant that I still learned a lot. One of the things that seems most applicable to the work I do not is the Scientific Method: Problem, Hypothesis, Thesis, Testing, Revision, Testing, Testing. Sounds like making a painting, a print, understanding materials. Thanks Dr. Drew! Did you know how much your methods would help an artist? Happy Monday Y'all!