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. I am using newsprint as the transfer paper and a #2 pencil for drawing.
Date: February 27, 2009
Researcher’s Name: Esther White
Plate Material: .032 Copper
Plate Size: 2.25 in x 7 in
Room Temperature: 76° F
I degreased the plate with Bon-Ami and water made into a paste. The paste was rubbed onto 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 ground across the plate’s surface just enough so that I could not see the copper sparkle through the ground. I waited 10 minutes before I began drawing. I drew for 25 minutes with a #2 pencil held perpendicular to the plate. After I finished the image I felt I should have waited longer before drawing due to humidity. I drew lines with heavy pressure and light pressure. Both methods of drawing worked in the transfer. After I completed my image I placed the grounded 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
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
Lines do not look distinct on the plate.
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: 20 Minutes
Lines drawn in the last five minutes did not etch well. The middle of the plate looks like it stuck to the paper because of a blurred line that moves down the center of the print. Areas of lighter etch could be because of an inconsistent ground application.