Nor has the alternative technique, recently introduced in England, of relying on an examiner's overall impression of a match, without any attempt at quantification.
In the next, he would reject traditional artists' tools in favor of found objects, black tar paper (textured and pebbly and quite iridescent, giving the impression of a midnight sky) or sentimental postcards, eliminating, in a sense, all traces of technique and skill--and even of the artist (some of the "objects" were assembled by carpenters).