ROSA watercolours were developed in collaboration with professional artists. Taking artists’ remarks and preferences into consideration, key features like colour palette, transparency and intensity of each colour, paint consistency and easy brushing were defined.Organic gum arabic provides perfect adhesion and an even colour flow, while the high quality organic and inorganic pigments guarantee purity and transparency of colour.The CLASSIC Set combines the traditional colours of the watercolour painting techniques. The majority of the colours being single pigment enable the artist to obtain numerous pure shades when the colours are mixed.The 2.5ml pans are contained in a convenient metal tin - perfect for studio or plein air painting.28 colours included: 702 Cadmium Lemon, 731 Cadmium Yellow Light, 732 Cadmium Yellow Deep, 730 Golden Yellow, 705 Cadmium Orange, 706 Cadmium Red Light, 707 Cadmium Red Medium, 708 Carmine, 725 Madder Red, 710 Violet, 713 Olive Green, 711 Green, 712 Emerald Green, 714 Turquoise, 716 Cobalt Blue, 718 Blue, 715 Ultramarine, 738 Blue Indanthrene, 717 Indigo, 719 Yellow Ochre, 721 Raw Sienna, 736 English Red, 723 Mars Brown, 733 Burnt Sienna, 722 Umber, 720 Sepia, 737 Payne's Grey and 724 Neutral Black.