Copper Sulfate – Saline Etch for Aluminum – Test 19: 5-Gallon Bath Strength Test

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 bath15 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.

Left to right: 15 sec, 3 min, 5 min, 8 min.

<previous experiment                                                                                                                                  next experiment>