Eglomise is a technique where paint is applied to the inside or the back of glass.
All glass art objects on this site are one of a kind and are painted on the inside of upcycled glass using different combinations of traditional lacquer and/or enamels, dyes and/or pigments combined at times with iridescent particles and/or metal leaf. Although art objects are water-proof, they are not dishwasher or microwave safe due to metals used in composition. The epoxy used to seal the art work is Art Resin, which has been approved by the FDA for food service. Clean outside as you would any glass product and wash inside with gentle detergent and soft cloth when necessary to avoid scratching gloss surface.
Luminaries are hand-painted glass using the same combinations and requiring the same care. When burning votive candles, layer bottom with glass pebbles or stones, place candle directly in the middle, and of course, never leave candles unattended. I have found that white ( not amber or incandescent) led battery operated votive candles available on Amazon work great to show off the colors in the translucent bowls. There are also changing color led lights available which display beautifully how colors interact with each other.