Search results for 'RCO'

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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This brush has an excellen point and spring well suited to detail work in acrylic, watercolour and oils Learn More

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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This coloured granular resist is painted on the plate and used in conjunction with Lascaux Spray/aquatint to create unusual etched effects similar to watercolour or tusche washes. 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

Handmade Paper, 100% Long Fibred Cotton Rag, Acid free, Medium-Rough surface, Deckle Edged. All papers are internally sized with neutral pH size. Learn More

Gum Arabic is a resoluble binding agent, commonly used in the preparation of watercolours, but also useful as an adhesive, a size, and in the production of soft pastels. It is a natural product, harvested from the Acacia tree between October and May. The highest grade of Gum Arabic comes from the Kordofan region of Sudan. It is exceptionally pale and pure and therefore particularly suited to watercolour painting. Please see the Formulas & Recipes section on our homepage for a recipe to make your own watercolour paints using Gum Arabic (currently under construction). Learn More

PR233

Potter's Pink is an artificial mineral pigment produced by roasting tin oxide with various other oxides. It was first discovered in the pottery region of Staffordshire in the late-1700s, and in the following century Winsor & Newton introduced Potter's Pink into their watercolour range under the name "pink colour". It went on to become a popular addition to watercolour palettes, offering an opaque, lightfast colour with a weak tinting strength and a medium level of oil absorption.

Toxicity A

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Water-soluble coloured pencils in a limited edition set. Viarco silkscreen series. Learn More

This unbranded watercolour metal box is the same as the lightweight metal boxes used by most of the major European colour-makers. The back of the box includes a thumb ring. Dimensions: 22.8 x 9.5 x 2cm Learn More

LIMITED EDITION Cornelissen Watercolour Gift Set contains : -Arches Watercolour Block 20 x 20 cm -Schmincke Watercolour Set with Brush, 12 half pans -Genuine Leather Cornelissen Watercolour Case. Available in green, red, tan and black, while stocks last. Gift wrapped in a box with Cornelissen wrapping paper. To specify the colour of the Leather Watercolour Case (green, red, tan or black) and the Arches Watercolour paper surface (Hot Pressed, Cold Pressed or Rough), please contact us directly. t: 0207 636 1045 e: info@cornelissen.com. Learn More

Liquid Watercolour (series 27). 18 shades of highly concentrated organic pigment in a light acrylic base. Low dosage of the binder allows dried colour to be dissolved up to 24 hours after application. Colours retain their strength when diluted with water, Drying Retarder or Gloss Intensifier mediums. Undiluted applications may bronze when dry. Learn More

Matchbox Set Dimensions 5.5 cm x 3.5 cm Prussian Blue PB27 Yellow Ochre PY43 Vermilion PR4, PY1, W21 Genuine Madder NR9 ***Please note, this item is handmade in small batches, please contact us at info@cornelissen.com to order online*** Learn More

Box Set Dimensions 9 cm x 5.5 cm Ultramarine PB29 Burnt Umber PBR6 Genuine Madder NR9 Vermilion PR4, PY1, W21 Mars Orange PY42, PR10 Indigo NB1 Yellow Ochre PY43 Prussian Blue PB27. ***Please note, this item is handmade in small batches, please contact us at info@cornelissen.com to order online*** Please note, this item is handmade in small batches, please contact us at info@cornelissen.com to order online. Learn More

This watercolour paint making set includes a 30ml glass vial of gum Arabic crystals and another of Hampstead Orange, a pigment rich in iron oxide. A pamphlet detailing a a watercolour recipe and an introduction to London pigment is also included. The perfect gift for artists getting into making their own art materials or those interested in handmade British earth colours. The pigment itself has a fine to medium grain size and has been washed, levigated and ground to create a stable high quality artist’s pigment.

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Ceramic palette, 4 wells, 8 cm x 8 cm Handmade in Somerset, UK. ***Please note, this item is handmade in small batches, please contact us at info@cornelissen.com to order online*** Learn More

Water-soluable soft carbon pencil similar to charcoal. Learn More

Handmade Porte-Crayon in brass for holding chalk or charcoal. Commonly used by artists in the Renaissance for drawing, the piece of sharpened chalk or charcoal is inserted into the end of the holder and secured in place by a sliding ring. Learn More

The Schmincke Mussini Luxury Wooden Chest contains 36 x 35 ml tubes, as well as many accessories, including palette knife, painting knife, palette cups, palette, mediums, charcoal and brushes. Learn More

Naples Yellow Light Pigment (PY41). Synthetic Inorganic pigment (Lead Antimoniate). Opaque. Good tinting strength. Excellent Lightfastness. Low oil absorption with fast drying rate. Suitable for all media except watercolours.

Toxicity D Lead is a highly poisonous metal which, if inhaled, ingested, or introduced to the blood through cuts in the skin, builds up in the body and can affect multiple parts of the body, including the digestive and nervous systems.

PERMITTED USES Over 18s only. Proof of age required. Restoration of art works and protected buildings when alternatives unsuitable.

IMPORTANT Please refer to the MSDS (Material Safety Data Sheet) below. Dispose of product as hazardous waste.

SHIPPING Please note, we are not able to send this product outside the UK.

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