Premium Block Printing Watercolours Metallic Assortment Our Premium Block Printing Watercolours are highly pigmented and easy to roll in the tray. You will achieve a good transfer to roller, block and paper, ensuring that your finished piece will have a good dense image with no holes or bubbles. High quality and great value! Water-based, metallic colours. 250ml tubes. One each of Gold, Pewter and Bronze. Shake well before use and store upright.