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 reverting back to newsprint as the transfer paper.
Date: January 14, 2008
Researcher’s Name: Amelia Vottero
Plate Material: .032 Copper
Plate Size: 4 in x 3 in
Room Temperature: 63° 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 was stiff but slightly easier to roll than the last test. I left the plate to sit for 10 minutes before I laid the newsprint down to do my transfer drawing. I drew for 40 minutes using a #2 hard pencil. I noticed as the time progressed that the areas that I used considerable force translated on the plate but lighter marks do not look like they will etch.
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
The etched marks reflect the order in which they were drawn. The first marks drawn after the plate was grounded retain their darkness but latter marks are faint or not visible at all.
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
Etched lines show signs of detail and pencil mark qualities. Marks that felt and looked superficial actually held ink and showed up well in the printed proof.