I tested how many layers of Lascaux Wash Ground can be applied to a plate. I painted wet Lascaux over previously dried wash ground areas I hoped to achieve a more painterly manner without losing any detail in the reticulation.
Date: March 10, 2010
Researcher’s Name: Maya M. Bajak
Plate Material: .032 Copper
Plate Size: 5 in x 7 in
Room Temperature: 74°
The plate was degreased with Bon Ami and water. I painted Lascaux 2094 Wash Resist over the entire plate with a bristle brush. This initial layer covered the entire plate surface. The Lascaux air dried for 15 minutes and then the copper plate was placed in the dryer box for an additional 10 minutes. I applied a second layer of Lascaux in the middle of the plate and followed the same drying procedure. The final layer was applied a week and a half later on the lower third of the copper plate. I noticed that the final layer is breaking down the previous Lascaux washes. It is important to remember that the plate must be completely covered with either wash ground or stop-out to ensure a proper etch.
The plate was etched in a vertical etching tank of Ferric Chloride at 38° Baume.
Timed Application of Mordant
Removal of Grounds
The grounds were removed using a stripper bath of Arm & Hammer Washing Soda and water (100 grams/1 liter). It took 10 minutes to remove the Lascaux ground using a nail scrubber brush.
After Bath Evaluation
The plate etched successfully however the third layer of wash shows signs of breaking down.
Unmodified Graphic Chemical & Ink Co. Bone Black #514 Etching Ink. The ink was carded onto the copper plate with mat board scraps and wiped with used tarlatan.
Paper Type: Hahnemule Copperplate
Paper Soaking Time: 20 Minutes
Press Blanket Setup: Sizing Catcher and Pusher, 8.5 pressure, Small Takach Etching Press
I determined that it is best not to layer the washes more than twice. On the bottom portion of the print you can see that the detail of the wash gets lost.