Glass Medium transforms regular acrylic color into permanent, scratch-resistant glass paint. Ideal for use on ceramic, porcelain and glass, the formula helps artists achieve a smooth, even flow without stroke marks or drips. Mix with Soft Body Acrylic or Acrylic Ink, then paint onto clean glass and leave to completely dry before curing in the oven at 300 degrees F/150 degrees C for 30 minutes. The result is a high gloss, finish which is durable, non-cracking and water resistant.