Creating an Acrylic Spray Aquatint Test 14

January 20 2015 (printed 1/20)
Researchers: Audrey Blood / Jenny Gover
Room Temperature: 67 degrees F
Humidity: dry, cold
Materials: Pledge Floor Care Finish, Akua monotype ink jet black, Speedball India Ink, Golden GAC-100, Golden airbrush medium, Golden flow release
Abstract: Altering the colorant of Edinburgh Mix #4

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Edinburgh Mix #5 (plate 17)
10 tsp Pledge Floor Care Finish
1.5 tsp Golden GAC-100
3 drops Golden Flow Release
3 drops Golden Airbrush Medium
3 tsp Akua Jet Black Monotype Ink

Edinburgh Mix #6 (plate 18)
10 tsp Pledge Floor Care Finish
1.5 tsp Golden GAC-100
3 drops Golden Flow Release
3 drops Golden Airbrush Medium
3 tsp Speedball India Ink

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Procedure:
We made two new Edinburgh mixtures, one with 3 tsp Akua Jet Black Monotype Ink and one with 3 tsp Speedball India Ink in order to compare the visibility of the two inks in the aquatint spray. We sprayed Edinburgh mix #5 and Edinburgh mix #6 through the Badger airbrush on the finest setting onto two 4.5″ x 6″ copper plates at a distance of 6 to 8 inches with approximately 15 passes. They were set in the drying box for 20 minutes.

The plate was step-etched on 1/20 in 38 degree baume ferric chloride. It was placed in the stripper bath of 3 cups washing soda to 12 liters of warm water for 10 minutes, rinsed, dried, and printed.

sprays_plates18_19
Spray of aquatint on newsprint

Conclusions:

Mixture
Comparing the three Edinburgh mixes on a draw down sheet, it was clear that Edinburgh Mix #4, with 4 tsp of Akua Jet Black Monotype Ink was the densest in color. Edinburgh Mix #5 with 3 tsp Akua Jet Black Monotype Ink and Edinburgh #6 with 3 tsp Speedball India Ink were nearly identical in color, the Akua ink slightly denser than the India Ink. Both mixtures sprayed evenly through the aquatint without any clogging or sputtering.

Ex_14_03
smear tests

Stripping
The ground came off easily after etching with approximately 10 minutes in the stripper bath.

IMG_3163-2
plate 17 after 10 minutes in the stripper bath 

Printing

We printed on a Takach press using 2 sizing catchers at 4.5 pressure. Ink: Charbonnel #55981 oil-based etching ink with 2 drops 00 plate oil. Paper: Hahnemuhle copperplate white. This plate printed well with a fine, even tone. Both Edinburgh mix #5 and Edinburgh mix #6 created comparable successful aquatints.

 

IMG_3170
Jenny wiping plate 18

plate17_print
print of plate 17

plate18_print
print of plate 18

Creating an Acrylic Spray Aquatint Test 15 >