Retarder Medium

All Jo Sonja products are 25% off. The discount will be shown in your cart.  Retarder Medium is an additive to extend the ‘open’ or drying time of Chroma’s Jo Sonja Artists’ Colors or Mediums.  It may be used as both a painting medium and for various techniques such as antiquing with all acrylic paints. Directions:• To use Retarder as a painting medium, lightly moisten the brush with Retarder before picking up paint.• To further extend working or ‘open’ time, Retarder may also be applied directly to a prepared surface. A mop brush may be used to ensure an even application.• Mix Retarder directly into palette colors beginning with a ratio of approximately 1 part Retarder to 3 parts of color to delay the drying time of the paint. Adjust ratio as required technique. The more Retarder that is added, the more transparent the color becomes.Antiquing:• A barrier coat of Clear Glaze Medium is recommended before antiquing, then thin paint with Retarder using a ratio determined by the strength o