To get the hang of gum printing it may be a good idea to print tone scales with the intended pigments. This print will be a useful reference when choosing colors and determining exposures and tone rendering.

gum_scales.jpg
A digital step wedge was printed on transparency film and plain paper which was then oiled for translucency. These “negatives” were gum printed (with different exposures) on a sheet of Somerset paper, sensitized with gum emulsion containing ivory black pigment.