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. Im using newsprint as the transfer paper and refrigerated the ink in the mixture.
Date: February 11, 2009
Researcher’s Name: Amelia Vottero
Plate Material: .032 Copper
Plate Size: 3 in x 5 in
Room Temperature: 76° F
I degreased the plate with Bon-Ami and water made into a paste. The paste was rubbed into the plate surface and rinsed away with water. The copper plate was blow dried and finished with a clean towel. The ground has a tendency to dry out in the open air so I refrigerated it. I allowed the ground to come back to room temperature before I applied it to the degreased copper plate. I rolled a thin amount of ground across the plate’s surface, just enough so that I could not see the copper sparkle through. I drew for one hour with a sharp pencil. I found out that holding the pencil upright created the most visible mark on the transfer paper. After I finished drawing I placed the copper plate on the hot plate until it was dry to the touch.
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 marks that I created by holding the pencil upright created the strongest lines.
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
False biting is visible in this print as well. It could either be that the ground was too thin or that it broke down in the Ferric Chloride.