Admittedly this is not an "article" but it is hopefully something that some photography student, teacher or practitioner will find useful when they can't immediately locate 20 square per inch graph paper onto which to plot (at .4 log H or Density units per inch) film or paper characteristic curves.
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Davidhazy, Andrew, "20 square per inch graph paper for photographic applications" (2004). Accessed from
RIT – Main Campus