Improve the gloss and drying time of your oil colours with this winsor and newton liquin medium this reliable favourite a general purpose semi gloss medium will half the drying time of oil colours making them touch dry within 1 to 6 days depending on colour and thickness it also improves the flow of the oil colours and reduces brush stroke retention many other mediums are available in our winsor and newton range to suit your needs they can be used to alter or enhance a range of characteri