K. Gorbatov proposed to use a special instrument to measure the hiding power. This device (Fig. 14) consists of an aluminum cylinder (instrument cover) 1, inside which there is another cylinder, a piston 3, which is moved by means of a pressing wire 2, and a piston 3 of the inner cylinder 3 Broken glass sheet 4 is arranged above, and the figure (for example cross) that useful ink is drawn under the glass sheet. (Related instrument: hiding power paper)
