These Winsor & Newton Professional Acrylic Azo Yellow Medium Colours come in 60ml and are part of a much larger range of colours totalling 80 different shades in entirety. The Professional Acrylic paints are their most premium quality acrylics range and currently one of the leaders in the industry. The artists acrylics have been synthesised with the most recent developments in the manufacturing of acrylics, resulting in 80 different colours that are beautiful when wet or dry and remain the same due to a transparent binder used in the paint, banishing colour matching mixups to a thing of the past.When you are working on your masterpiece it\'s now much easier to match from palette to canvas and will consistently deliver sublime and vibrant colours. The working time for these acrylics is longer than normal compared to the industry standard, giving you better versatility in your approach and to fix any mistakes before it dries. Paint consistency is velvety and thick with no stringiness to it, it blends well and can be integrated well with other mediums including being thinned with water for some watercolour techniques, however once dry acrylics will be permanent and resistant to water.- Azo Yellow Medium - 60ml size - 80 colours in total - Stays the same wet or dry - Longer working time