It is not good for your lungs. Take the work out side or hold over a newspaper and tap the back to get rid of excess pigment. Try to get used to wearing disposable gloves . The pigment can be absorb through the skin.
Gloves also help keep the work clean.
It is much easier to clean the pigment off the gloves before changing colours than off your hands. If you are using this medium daily, an air filter in your working space is better for your health. When using fixatives , spray in a well-ventilated area, preferably outside. Try using anti-static eyeglass cleaner on the inside of the glass. Be organized .