I : 33
A reversal of Seclusion, also from the Graphic Tectonic series.

The amassed white horizontals (at bottom, center, and top) appear whiter than the thin white verticals, just as the upright black rectangles (in the lower and upper half) seem darker than the black between the white lines. And left and right from the center, thick and thin white lines resulting in small triangles cross the whole — still whiter and sometimes even indicating color. Physically, of course, all whites are the same and are the white of the paper. As to the black, only one ink has been used. But in our perception there appear different whites and different blacks. Thus we see all whites advancing from the black, though they are physically empties and are thus lower than the blacks.