I am testing a soft ground mixture that consists of 3 parts Graphic Chemical Water based Block Printing Ink Peacock Blue, 2 parts Golden Acrylic Silkscreen Medium, and 1/2 part Golden GAC 200. In am using newsprint as the transfer paper.
Date: February 3, 2008
Researcher’s Name: Amelia Vottero
Plate Material: .032 Copper
Plate Size: 4 in x 3 in
Room Temperature: 77° F
I degreased the plate with Bon-Ami and water made into a paste. The paste was rubbed across the plate surface and rinsed away with water. The copper plate was blow dried and finished with a clean towel. I rolled a thin amount of soft ground across the plate’s surface just enough so that I could not see the copper sparkle through the ground. The ground remained sticky for over an hour which allowed more drawing time. However the sticky quality of the ground made it more difficult to work with. The newsprint lifted more of the ground from the plate but I do not think it has improved the process. I allowed the plate to air dry and placed it in the Ferric bath.
The plate was etched in a vertical etching tank filled with 35° Baume Ferric Chloride.
Timed Application of Mordant
20 Minutes/Rinse/10 minutes/Rinse/15 Minutes/Rinse (A rinse consisted of lifting the copper plate out of the vertical tank, rinsing the plate with cold water, and then returning it to the etching tank.)
Removal of Grounds
The ground was removed using a stripper bath of Arm & Hammer Washing Soda and water (100 grams/1 liter). I rinsed the plate under warm water after soaking it in the stripper bath for 10 minutes.
After Bath Evaluation
There are a few distinctly etched lines but the softer marks are not visibly etched.
The plate was inked with unmodified 50% Graphic Chemical Bone Black and 50% Graphic Chemical Stiff Black. The ink was carded on with a orange plastic scraper, wiped with used tarlatan, and hand wiped.
Paper Type: Hahnemule Copperplate
Paper Soaking Time: 15 Minutes
Press Blanket Setup: Small Takach, 2 Blankets, 8.0 pressure
Little of the softer marks translated in the print. Many lines that appear dark and defined on the newsprint transfer did not print well. Copper plate has horizontal scratches which were already on the surface prior to my experiment.