Firing Temperature—1140-1400 F
Mixing: All Reusche colorus come in a powder form and need to me mixed with a vehicle before application.
Each kit includes Gum Arabic, and two different types of mixing mediums.
Mixing with Gum Arabic: Start with the colour. Place a small amount onto a ground glass slab and flatten the colour to approximately 1/8” thick. Sprinkle the Gum Arabic over the colour, just enough to look like freshly fallen snow. You should be able to see colour underneath. Add water in small amounts mixing between additions. You want a consistency similar to yogurt. The paint should be soft but retain its shape. It the colour spreads out on your slab, it is too thin. More colour can be added to the mixture to thicken.
Mixing with oil based or water based medium: The recommended ratio for mixing with most mediums for hand painting is 80 % colour by weight to 20 % medium by weight. Weight your colour, add your medium and mix to a smooth consistency similar to yogurt.
There are many different oils and mediums that can be used for mixing your colour. Refer to the book “The Art of Painting on Glass” by Albinas Elskus for more helpful information on different mixing mediums and techniques.