Winsor & Newton\'s Prussian blue watercolour stick. Prussian Blue is a deep blue pigment. Watercolour sticks offer the excellent professional quality of Winsor & Newton\'s standard watercolours in a useful compact stick form. This makes them very versatile and small, perfect for taking on the go and working while travelling. Use dry to sketch and make hard marks on your surface and then add water on top to transform your marks into washes of colour and soften areas. Apply on to wet surfaces to allow lines to bleed out and naturally diffuse themselves. Available in a wide range of over 45 colours. - Brand: Winsor & Newton - Watercolour stick - Colour: Prussian Blue - Colour number: 538 - Series: 1