I purchased this and have stored it in a dark place. *This is an unopened item, but there may be minor scratches or peeling on the box. Please refrain from purchasing if you are looking for a perfect item or are particularly concerned about the condition. The following is an excerpt from the product description on a certain online shopping site: Holbein Acryla Gouache (Opaque Acrylic Paint) ＜Features＞ 1. It dissolves in water, but once dry, it will not dissolve in water again. When thinning Acryla Gouache, add water and wash your brushes with water. Once it dries, it will no longer dissolve in water. 2. It dries quickly, allowing for speedy artwork creation. It dries in 20-30 minutes, allowing for quick creation. 3. A wide range of mediums supports a broad range of expression. A wide variety of base materials are available, such as gesso and modeling paste, allowing for a wide range of expression. 4. Links to the PCCS (Japan Color Research Institute Color System) 24-hue circle. Acryla Gouache tubes are printed with Munsell notation, making it convenient for color management. Also, there are 24 colors linked to PCCS, so when adopted as school materials, you can understand the properties of colors through mixing, and study in conjunction with arrangement practice. 5. Excellent lightfastness. It uses excellent pigments with little fading. Colors do not dissolve the underlying colors even when layered, and colors do not get dirty. Artwork is created quickly and the finish is beautiful. This is a convenient opaque acrylic resin paint.