However: I don't know what to make of the bleeding test of the staining pigments (on the right). And I had difficulty "reading" the results of the opacity/transparency; staining and lifting test (below). Pigments that weren't supposed to be staining stained. Pigments that were supposed to stain lifted. Amount of drying time and the pressure of the rub seemed to make a difference--enough of a difference that perhaps I should run the test again? As for coverage, that depended a lot on what hardness/softness of pencil was used for the scribble; I have nothing to fear from my 3H lead, my studio standard. My conclusion: skipping these tests when I first read the book might have been a wise move? I came away with nothing but questions.
I'M FAT. IT'S FACT.
NO ONE KNOWS BUT MY CLOTHES,