In this test we sought to replicate the results we achieved in the first paper transfer of the tone and line test plate.
Date: January 8, 2013
Researcher’s Name: Sally Mackenzie and Kayla Biggs
Plate Material: Copper .032
Plate Size: 5.5″ x 6″
Room Temperature: 68 degrees Fahrenheit, sunny and dry
We prepared the backside of the plate used in the last paper transfer by filing the edges, polishing the surface with Putz pommade, and degreasing alternating Bon Ami and soy sauce. We then warmed the BIG on a palate knife above the hot plate. When it was warm but not yet runny, we rolled it out into a thin slab. Simultaneously we slathered 1 Tbsp of Gum Arabic into the surface of our printed image. We rolled the BIG over the gummed image, and ran the roller over newsprint after every pass to remove excess gum. After each roll we also dotted the image with a damp sponge dipped in gum. This helped the image retain adequate moisture to resist the BIG in the white areas. After this we placed the image on the prepared copper plate and transferred the image using the Charles Brand press with two sizing catchers, two sheets of newsprint and 0.19 pressure. The transfer was light, but clearly showed the information. We baked the plate for 15 minutes at 350 degrees F.
We etched the plate for 25 minutes in 41 Deg. Baume Ferric Chloride.
Timed Application of Mordant
Removal of Grounds
We removed the ground and the toner spots using Soy Solv and a toothbrush.
After Bath Evaluation
Upon removal from the bath, the plate was clearly etched, with the ground still intact. Additionally, some spots of toner remained after etching, and were more difficult to remove than the BIG. They did, however, come off with Soy Solv and a toothbrush.
We inked the plate using Graphic Chemical oil-based etching ink in Bone Black. We applied the ink with a mat board chip, and wiped with a tarlatan, but did not hand-wipe.
Paper Type: Hahnemuhle Copperplate
Paper Soaking Time: Roughly 30 minutes
Press Blanket Setup: Charles Brand 2 sizing catchers, 2 sheets newsprint, 0.19 pressure
The plate yielded results consistent with our last successful paper test plate. There were some areas that were more true to the source image. For example, both the dark and white fine lines printed clearly. This was an improvement over previous tests in which some white details held ink. Also, the dark toner areas on this proof printed dark. In previous tests usually the darkest areas stop-out and print light. Yet, overall the effect of this proof is similar to the last. It is rather gray and splotchy without a wide variety of tone.