Mixing dry mica and other pigments into airbrush medium
I'm new to airbrushing. I've been using various mediums on leather, clothing, other fabric items and a variety of things such as vases, wood, stones and shells. Forgive me if this topic is covered in the archives. The search function is bogging down for me today.
With leather, I primarily work with exotic leathers--ethically sourced, and like to bring out the beauty of the grain patterns. The mica pigments are great for this. While these can be sourced from craft, art and cosmetic vendors, I found the best prices come from auto paint pigment vendors. I've found plenty of information on what ratios to use of the ghost, flip, interference, chameleon blends for solvent or plasti dip spraying but not much on using water based mediums.
For the ghost pearl effects, the ratio is about 1 level teaspoon per quart of sprayable clear base. Higher ratios lost the interference transparency. When trying to mix these with acrylic mediums, I've had a hard time getting thin enough layers to keep the transparent or translucent effects. Pretty but not what I hoped for.
I've found the posts on mixing acrylics for airbrushing starting with commercial acrylics and I have information on mixing dry pigments with acrylics for regular painting. But nothing on the ratios for going straight to airbrush medium. I do realize that will vary with the size and weight of the pigments, and traits of various mediums. Jacquard suggested 10% by weight of their pearl ex micas to fabric medium or other acrylic bases. The pearl ex tends to be larger particles than some of the others I have.
I've considered mixing a base of pigments to fabric medium and trying the info on mixing for airbrush. If anyone has suggestions or tips on what mediums, ratios, products, might do best at keeping in suspension and how to apply, I would be delighted. I wondered if the water based medium is too thin to keep in suspension well?
I have a Neo airbrush with the small table top compressor. .3 needle. No problems with clogging.