Encaustic painting, also known as hot wax painting, is an ancient process involving heated beeswax and damar tree resin to which colored pigments are added. The word encaustic originates from the Greek word enkaustikos which means to burn in. This technique was notably used in the Fayum mummy portraits from Egypt around 100–300 AD
Care of your Encaustic Painting
These paintings are extremely archival, but as with any fine art, care should be given to them. There should be no fear of the work melting in normal household conditions. The wax and resin will not melt unless exposed to temperatures over 150 degrees Fahrenheit. Leaving a painting in as car on a hot day would not be advisable or hanging a painting in front of a window with direct desert-like sun. They are also sensitive to freezing cold temperatures.
Some encaustic colors tend to become cloudy over time. If this happens, simply rub the surface with a soft cloth. Over time the surface retains its gloss as the wax medium continues to cure and harden for up to 1-3 years.