Do I understand you correctly that you can make a gum mix of your choosing and then expose it to a standard step tablet and get gradation extending through 15 steps?
> Date: Wed, 10 Dec 2008 22:57:33 -0500 > From: email@example.com > Subject: RE: Extending gum range > To: firstname.lastname@example.org > > > "Gum range" is not a constant... that is, it's tied to a particular > density of color. A very lightly pigmented emulsion can get 15 or even > more steps. A very densely pigmented emulsion can get as little as > four... and long soaks can increase range by opening up the darks. > > J. > > >