gumbies/Smieglitz
Karl P. Koenig (kpkoe@swcp.com)
Wed, 10 Jun 1998 13:36:03 -0700
According to Betty Hahn, the mother of modern and not so modern gum
printers (see her volume and traveling exhibit---most recently at Eastman
House called "Photography or Maybe Not") she recommends a 5% solution
(achieved by weight of the salt) of potassium bichromate. For myself I
just use a saturated solution, warmed up to 100 F to guarantee a good load
of the chemistry. If there are plenty of crystals at the bottom of the
bottle, it is saturated, if not, it is not. Works just fine for gumoil and
gum printing. You may classify this advice in the touch of cilantro, dash
of salt style of alt proc printing. Karl