MATERIALS
Products and Equipment needed to make up and apply an aquatint:
- Speedball Screenfiller
- Koh-i-Noor India ink
- Future Floor wax (Klear or Klar)
- clean water to make up the aquatint spray solution
- airbrush compressor
- spray gun / designer's airbrush
- pin / needle (for cleaning spray gun blockages)
- sheets of newsprint for test spraying
- a bucket of soapy water
- paper towels
- degreased plate (not sanded)
METHOD
Make up your own aquatint spray as follows:
Example 1:
Mix Speedball Screenfiller with 20% to 30% water
or
Example 2:
Mix some India ink (ideally Koh-i-Noor) into Future floor wax
(use enough India ink to get a black; test on paper)
or
Example 3:
Mix one of the following binders with Koh-i-Noor ink then with 20% to 30% water:
Lascaux 2060 or Golden GAC 200
(excellent corrosion resistance and easy to strip)
or
Example 4:
Use ready-mixed Badger Aquatint Solution
METHOD
Apply an aquatint spray as follows:
- Attach the airbrush to the compressor and turn on the machine
- Make sure the facility's ventilation is running
- Put on gloves and goggles
- Fill the airbrush's detachable ink container with ink and re-attach
- Test spray density on white paper (about 40% to 50% dots) you are looking for a FINE MIST of black dots. Once satisfied with the result on paper, spray onto your plate
- Spray in even passes. Do not overspray as the plate will not etch if covered too thickly with dots
For a base aquatint, aim for a density of dots that will cover between 40% to 50% (not more than 50%) of the plate surface.
Create marks on top of the aquatinted plate with Crisco, oil crayon, Scotch tape, Future or acrylics; during etching these marks will remain
lighter in tone.
You may create successive layers of tone all the way from white via
various layers of grey to black according to how long you etch the plate.
You can create a whole tonal range in one etching stage simply by
varying the density of the sprayed dots. You can also make blends,
graffiti marks and stencil effects this way.
Try dissolving some of the sprayed plate surface with water; you will get amazing random wash effects.
After etching, any fatty deposits (Crisco or oil crayon) need to be
washed off with soapy water. Acrylics can be stripped using soda ash or left on the plate for printing.
Typical etching times are as follows: -
Zinc etched in Saline Sulfate Etch
lightest grey : 1 second
grey : another 5 seconds
darker grey : another 20 seconds
and so on up to black : about 10 to 15 minutes
Copper etched in Edinburgh Etch
lightest grey : 5 seconds
grey : another 20 seconds
darker grey : another minute
even darker grey : another 5 minutes
and so on up to black : about 30 to 45 minutes