Name: Nick Osetek & Tessa Chambers Date: 5/31/2018
Room Temperature: 76*F Humidity etc: Slightly Humid
Experiment Title: 5-Gallon Bath Strength Test
Experiment Goal: After etching in our 5-gallon bath for a sufficient amount of time we decided to retest the bath with a comparison step test to our previous tests.
Plate material: Aluminum 5052
Plate Preparation: Degreased with Bon Ami and soy sauce, backed with contact paper.
Evaluation of Plate Preparation: Normal
Etching Bath Notes: At this point we have etched in our bath for 138 minutes & 33 seconds
Time in bath: 15 sec, 3 min, 5 min, 8 min
After Bath Evaluation: The bath is still green, with copper from the aluminum floating to the top.
Removal of Grounds: N/A
Inking Methods: Bone black, 10% Burnt Plate Oil 00
Paper Type: Hahnemuhle Copperplate
Soaking Time: 30 min – 1 hour
Press, blanket set up, pressure: Praga press, 2 catchers, 1/8, 1/8
Conclusions: The step test was successful. We reached close to black at 5 minutes with very similar results for 8 minutes. We wondered if the aluminum possibly reaches an exhaustion point when etching black.