Name: Tessa Chambers & Nick Osetek Date: 3/15/2018
Room Temperature: 70*F Humidity, etc: Dry
Experiment Goal: To become familiar with etch times in the copper sulphate saline bath to create aquatint shades. (1-6 minutes increments.)
Plate Material: Aluminum (5052)
Plate Preparation (surface prep, ground application, image making process, etc): The plate was beveled, degreased with Bon Ami, then the plate was then backed. Small 1-6 minute sections were drawn in on the plate to monitor etch times for each section.
Evaluation of Plate Preparation: Aluminum plate took much more time to degrease compared to copper.
Etching Bath notes: 140g copper sulphate, 140g salt, 2 liters of warm water. This was the third use of the bath.
Time in Bath: 1 minute intervals until 6 minutes.
After Bath Evaluation: Plate was etched as planned. The bath seemed greener after this plate was etched, compared to the first test.
Removal of Grounds (chemicals used and evaluation of effectiveness): No grounds used.
Inking Methods: Hanco Bone Black oil based etching Ink, 10% Burnt Plate Oil 00, wipe plate normally.
Paper Type: Hahnemuhle Copperplate
Soaking Time: 15-20 minutes
Press, blanket set up and pressure: Pragda press, 2 blankets, Right setting: 4/9 Left setting:5/9
Conclusion: Our plate printed fairly dark without much of a noticeable difference between 3 and 6 minutes. The shade jumped quickly from 1 to 2 minutes. Making the tones much less fluid between times than we would’ve liked.