Blockx, Oil Paint, Cadmium Lemon Yellow - Tube 35ml. The range of extra fine oil paints from Blockx includes 105 vibrant colors, all of which exhibit exceptional lightfastness (grade 7/8 on the international BWS measurement scale). The extra fine oil paints from Blockx are primarily made from pure monopigment, without the addition of fillers or additives. Thanks to the unique traditional manufacturing method of grinding on porphyry stone, mixed with traditional binders, the creamy textures of Blockx oil paints are highly concentrated in color.