This 225ml medium from Daler-Rowney is a part of their Adigraf range, offering a broad selection of tools, surfaces, mediums & accessories for all of your block printing needs. Use this medium to convert oil paints into vibrant, professional-quality, oil-based printing inks. Due to the slow-drying nature of oil-based materials, please allow between 3-5 days before handling or over-printing your finished pieces. Ideal Mixing Ratio Paint: 1 part Medium: 1.5 parts Once mixed, be sure to roll out your inks & leave them for around 30 seconds before use. This allows the medium & colour to combine appropriately & provide the right "tack" for printing.