The Winsor & Newton Professional Water Colour Whole Pan in Payne's Gray is a high-quality watercolour paint that is perfect for professional artists. This paint is made with the finest pigments and is highly lightfast, meaning it will retain its colour even when exposed to light. The paint is also highly transparent, allowing for subtle colour mixing and glazing. It is also easy to rewet and can be used with a variety of techniques, from wet-in-wet to dry brush. The paint is also non-toxic and safe to use.This paint is suitable for a variety of surfaces, including paper, canvas, wood, and more. It can be used with a variety of brushes, from sable to synthetic, and can be mixed with other watercolour paints to create unique colours. The paint is also easy to clean up, simply rinse with water and a mild soap.The Winsor & Newton Professional Water Colour Whole Pan in Payne's Gray is an excellent choice for professional artists looking for a high-quality watercolour paint. It is highly lightfast, transparent, and easy to use, making it perfect for creating beautiful works of art.