Daler Rowney System 3 Acrylics are versatile water-based colours made from high quality pigments. System 3 Acrylic colours are lightfast, permanent (ranking from 3 to 4 stars for most of the colours), opaque (10 opaque and 20 semi-opaque colours), flexible and quick drying, making them suitable for applications on multiple surfaces both indoor and outdoor. High quality pigments, superior pigment loading allowing to be thinned with water. System 3’s comprehensive range of colours offers excellent light-fastness, permanence (36 colours offering 4*), durability and covering power System 3 Original colours are fully intermixable and suitable for interior use Fluorescent colours are not recommended for exterior use as they are not lightfast; all other colours are both lightfast and durable