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PB15:3

Phthalo (Mona) Blue is a synthetic organic pigment, Copper Phthalocyanine, that has been in use since the 1930s. It has an extremely high tinting strength and is a staining colour, so cannot successfully be lifted in watercolour. It requires a wetting agent to fully disperse into a medium, and, when used at full strength, a copper sheen is visible in dried paint film. It is transparent, very lightfast, and has a medium-to-slow drying rate in oil.

Toxicity: C

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Rohrer & Klingner Liquid Watercolour Drying Retarder 50ml Learn More

Fill with non-waterproof ink of your choice or fill with water for watercolour trips. Available in Fine, Medium and Broad tips. Learn More

PB27

Prussian Blue is a synthetic organic pigment that was discovered by the paint maker Diesbach, apparently by accident, in Germany in the early eighteenth century. For many years, it was used not only as a colour in its own right, but also as a component of the original Hooker's Green. The other ingredient, gamboge, is highly fugitive, which is why many watercolours painted with Hooker's green have taken on a bluish tone with with age.  

It is a very transparent and heavily staining colour. It dries quite quickly in oil, and can therefore wrinkly if applied too quickly. It is suitable for use in oils, watercolour, and egg tempera. However, it shouldn't be used in conjunction with alkali substances, such as Lead White or Calcium Carbonate as it can turn brown, so it isn't suitable for fresco. For the same reason, it isn't used with acrylic resin binders due to their alkaline nature, so most paint manufacturers will replace Prussian Blue with a mixture of Phthalo Blue and black in their acrylic ranges. It requires a wetting agent to fully disperse into a binder.

Toxicity: B

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Verdigris is an artificial pigment that dates from antiquity. Originally, it was produced by exposing copper to vinegar; nowadays acetic acid is used. It is acidic, so can contribute to the deterioration of paper supports. For this reason, it is more suited to oil or tempera painting than it is to watercolour. In tempera painting, it should be bound in animal glue or isinglass glue rather than egg york. When used in oil painting it should be held in a resin oil or balsam such as Venice Turpentine, as it can turn brown when ground directly into linseed oil. It is a fast-drying, transparent pigment, with a visible crystalline structure. 

Larger quantities are available by request.

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PB28

Cobalt Blue is an artificial mineral pigment, produced by the calcination of cobalt oxide and aluminium oxide. It has been widely used since the early 1800s, following its discovery by the French chemist Thenard at the beginning of the century. The name Cobalt has its roots in the German word Kobold, meaning imp or evil spirit. German miners specifically used this name in the late-Middle Ages, as the presence of Cobalt ore in the mines made the extraction of silver very difficult. They were possibly aware of the toxic properties of the mineral frustrating their efforts.

Cobalt remains a very popular colour today, and is present in most ranges of paints, being a semi-transparent pigment that is stable in all media. As a watercolour, all cobalt pigments tend to granulate. As an oil paint, it requires less oil content than most other pigments, and dries quite quickly. Like Cerulean Blue, some artists may choose to bind it with poppy oil, to avoid any possible colour changes brought about by the yellowish cast of linseed oil and the pigment's weak tinting strength.

Limeproof

Toxicity: C

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Rohrer & Klingner Liquid Watercolour Gloss Intensifier 50ml Learn More

Zinc White, or Zinc Oxide, is an artificial mineral pigment that was first produced in France in the late 18th century. Its use in commercial watercolours as Chinese White pre-dates its inclusion in oil painting. It is a semi-opaque, lightfast pigment, which dries very slowly in oil. Of all white pigments, it produces the most brittle paint film, so is not recommended in large quantities for impasto techniques. However, it is a good addition to a palette which requires a less overwhelming white than Titanium White.

Toxicity: B

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Cornelissen Lithography Sponge, Compressed. Designed to keep the litho stone wet during printing. It can be used for preparing printmaking or watercolour paper. Learn More

Made from organic walnut husks collected in Cambridgeshire, this deep brown walnut ink is made to an 18th-century formula. Small batches of the ink are blended to give the required consistency and strength. It has good permanence, but will eventually fade if left in direct sunlight for sustained periods of time, and is not wholly waterproof, but has some staying power, especially on sized watercolour papers. As with all handmade products derived from natural ingredients, there may be slight variations in the colour and consistency as a result of seasonal changes.

Not Suitable for fountain pens. Learn More

15 ml pots of pure pigment Learn More

STABILO CarbOthello is a chalk pastel coloured pencil range available in up to 60 colours. With its wonderfully dry and dusty stroke it is just like a chalk pastel in pencil format. It's very popular with artists, art students and people with creative hobbies. Its high pigmentation guarantees great luminosity and opacity as well as colour fastness and colour brilliance especially on dark backgrounds and delicate papers. What's more it can be sharpened to a very fine tip which make it ideal for detail. Colours can be dry mixed and blended which makes colouring more fun and special.

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Prepared exclusively for Cornelissen following a Medieval English recipe, This handmade ink is produced in Cambridgeshire, from soot harvested from a working 19th-century forge, powered by charcoal and wood. Small batches of ink are blended to give the required consistency and strength. Forge Lamp Black is a thick, smooth non-waterproof ink that has good permanence. It can be watered down, and should always be shaken well before use. As with all handmade products derived from natural ingredients, there may be slight variations in the colour and consistency. Ingredients: Soot, gum Arabic, and clove oil.

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For removing pencil, charcoal and pastel or paper cleaning. Learn More

Pure soft synthetic one stroke brush. Learn More

Pigmented rubber latex. Application gives a water impervious film to protect areas from colour applied in broad washes. Not removable. Learn More

Fine golden synthetic fibre. More springy than da Vinci Cosmotop Spin (but with lower water absorption) making it an excellent brush for watercolour, gouache, acrylic and oil painting. Learn More

Winsor & Newton Designers Gouache Learn More

Gives pearlescent or glitter effects to watercolours. Learn More

Drawing gum for masking specific areas which should remain white on water-colour paper, smooth drawing carton, photographs or films. For direct application with the dispensing bottle. Contains: synthetic resin dispersion without ammonia. Learn More

Application gives a water impervious film to protect areas from colour applied in broad washes. Remove by peeling. Learn More

Inspired by traditional tailor’s chalk block, prepared for drawing and painting. Water soluble and extremely soft, choice of 6 traditional earth colours: sanguine, sepia, dark brown, brown, ochre and carbon black. Learn More

Plastic 10 Well Round Palettes Learn More

Economical, hard-wearing brushes suitable for watercolours and acrylics. They retain their points well. Learn More

Gives granular appearance to add dimension to otherwise flat areas. Learn More

Create effects similar to granulation effects in watercolours, with an even paint flow. Learn More

Finest extra smooth synhetic fibre. A soft brush with excellent colour holding capacity. Learn More

Pigmented rubber latex. Application gives a water impervious film to protect areas from colour applied in broad washes. Remove by peeling. Learn More

Fine golden synthetic fibre. More springy than da Vinci Cosmotop Spin (but with lower water absorption) making it an excellent brush for watercolour, gouache, acrylic and oil painting. Learn More