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Cornelissen Glass Mullers are handmade using superior boro silicate laboratory glass, which is 40% harder, more heat resistant, and offers better clarity than soda-lime glass. The base of each muller is ground perfectly flat, and sand-blasted to create a fine tooth to facilitate the grinding of pigments. The tall handle features an ergonomic top, to ease fatigue when grinding large amounts of pigment. Mullers act as flat-bottomed pestles, which are used to grind pigment into a binding medium, suspending it evenly to create a uniform covering of binder around each pigment particle. Using a muller and slab, rather than simply mixing pigment and binder together, will create a more homogenised and stable paint. Use in conjunction with a Cornelissen Glass Slab to make paint efficiently. The sand-blasted texture of the muller and plate helps to push and distribute the pigment throughout the binder quickly. This will mean less grinding, and more painting! Learn More

Colophony is a by-product of the distillation of turpentine. It is soluble in most solvents, but considered an adulterant in varnishes and paints, as it forms a weak surface that is prone to darkening and cracking. It is, however, a key ingredient in wax-based etching grounds, imparting hardness, and can be used in powdered form (rosin) to make aquatints. Learn More

Beeswax is derived from melted honeycomb, and is available in two grades. Bleached Beeswax Pellets are white, having been bleached by the sun, and are an appropriate choice for using with pale colours, although they may revert to yellow over time. Natural Beeswax Pellets are yellow in colour, and offer a more flexible structure with a higher resin content. Beeswax has a melting point of 63-66°c, and may turn brown if over-heated. It is the most widely used wax in artists' materials, having a wide range of applications. Please see below for more details.

 

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Roberson Glass Mullers are handmade using high quality-glass. 

Mullers act as flat-bottomed pestles, which are used to grind pigment into a binding medium, suspending it evenly to create a uniform covering of binder around each pigment particle. Using a muller and slab, rather than simply mixing pigment and binder together, will create a more homogenised and stable paint. 

Roberson Glass Mullers are handmade using superior boro silicate laboratory glass, which is 40% harder, more heat resistant, and offers better clarity than soda-lime glass. The base of each muller is ground perfectly flat, and sand-blasted to create a fine tooth to facilitate the grinding of pigments.

Use in conjunction with a Cornelissen Glass Slab to make paint efficiently. The sand-blasted texture of the muller and plate helps to push and distribute the pigment throughout the binder quickly. This will mean less grinding, and more painting! 

NOTE: Sizes may vary slightly as these are handmade products. 

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Poppy Oil is a slightly later addition to the artist's cabinet than Linseed Oil and Walnut Oil. It is generally used as a binder for pale colours, where the warmth of Linseed Oil is not desired. It provides a matte finish and dries very slowly, so we would not advise using it in conjunction with slow-drying pigments or in underpaintings. A paint film produced by Poppy Oil is weaker and softer than that created by Linseed Oil. This is because it contains a smaller percentage of linolenic acid than Linseed Oil; this substance imparts both strength and yellowness to an oil.  

Although some of these properties can be perceived as drawbacks, paints made with Poppy Oil generally obtain a "short" or buttery texture without the addition of waxes or other additives, which can be an advantage for certain colours that produce poor consistencies in Linseed oil alone. Sometimes, the addition of a small quantity of Poppy Oil when grinding a tricky or "stringy" pigment in Cold Pressed Linseed Oil can introduce some of benefits of Poppy Oil, without transmitting its negative characteristics.

Paints made with Poppy Oil are particularly suited to "alla prima" working methods, where paint is applied spontaneously. When working in successive layers, Poppy Oil would only be appropriate for the final stages of a painting.

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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, while Nigerian Gum Arabic (while stocks last) is better suited to stone lithography and other printmaking techniques. 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

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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CASANEO water colour brush round - Made from extra soft synthetic fibres with an extraordinary elasticity and an extremely high colour absorbing capacity - Short black polished handles - For watercolour, reverse glass and silk painting, design, graphic and retouching - Extraordinary elasticity and extremely high colour absorption capacity - Particularly suitable for watercolour and fluid acrylic colour Learn More

Charbonnel Blacks Learn More

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Genuine Ivory Black is produced by burning reclaimed ivory, such as piano keys. These are antique, mainly Victorian pieces, using ivory with started out as hippo or walrus teeth, and offers a higher carbon content and greater tinting strength than modern-day equivalents, which are usually derived from animal bones. It is a particularly slow-drying pigment.

Larger quantities are available by request. While stocks last.

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Beeswax is derived from melted honeycomb, and is available in two grades. Bleached Beeswax Pellets are white, having been bleached by the sun, and are an appropriate choice for using with pale colours, although they may revert to yellow over time. Natural Beeswax Pellets are yellow in colour, and offer a more flexible structure with a higher resin content. Beeswax has a melting point of 63-66°c, and may turn brown if over-heated. It is the most widely used wax in artists' materials, having a wide range of applications. Please see below for more details.

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A luscious sunshine yellow that can be layered to produce deeper shades. As a blend of organic dyes derived from saffron and turmeric, this ink is not fully lightfast. Unlike other inks in this range, it has a granulating texture that displays the individual colour particles. 

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Isinglass is derived from the dried swim bladders of fish, with Salianski Isinglass being the highest grade available. In the Russian Icon tradition, it commonly provided the glue component in gesso recipes, and was sometimes mixed with pigment to make tempera paints, due to its high binding strength. It can be used to make a pale, clear glue, which is less prone to darkening than other animal glues, and which is particularly flexible, making it a useful material for repairing textiles. Learn More

Linseed Oil is derived from flax seeds, and appears on our shelves in many guises: Cold Pressed, Refined, Stand Oil, and as a key ingredient in many mediums. It has been appreciated for its drying properties since the Medieval period, and has become the most popular oil used in painting today due to the strong, flexible and glossy film that it creates. Cold Pressed Linseed Oil is ideal for the grinding of pigment to make oil paints. The process of producing Cold Pressed Linseed Oil results in a lower yield, but the resultant oil is of a superior quality to oil that has been extracted by other methods, creating a paint film that is more resistant to embrittlement on aging. Its yellow colour is caused by the high concentration of linolenic acid, the presence of which provides durability to the paint film. The amount of oil that each pigment requires can vary enormously. Alizarin Crimson, for example, requires a high percentage of oil compared to most other colours. We would always recommend mulling the pigment and oil together thoroughly to create a "short" or buttery paste, with evenly dispersed, well-coated pigment particles. This process contributes to the strength and flexibility of the paint film, and prevents the inclusion of excess oil. Origin: USA Learn More

A glass slab with wooden cradle for the grinding of pigments.

The friction created between the sand-blasted surfaces of the glass slab and muller facilitates the thorough mixing of pigment and medium, creating a consistent and strong paint body. This slab can be used to manufacture many types of paint including watercolours, egg tempera and oils.

Mulling is of particular importance when making oil paint; simply mixing pigment and oil together using a palette knife will result in an unstable substance with poor plasticity, which contains a large amount of excess oil and unevenly distributed pigment particles. Thorough mulling in a figure-of-eight motion will enable the pigment to be fully combined into the binder, strengthening the resultant paint film.

PLEASE NOTE: The separate glass slabs are in stock but it is a call to order item due to the fact that we cannot guarantee its safe delivery, however well we package it. Please ring us to discuss your delivery options. In combination with the glass frame, delivery is more secure but we still cannot guarantee a delivery without breakage.

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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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Damar is a pale, almost colourless tree resin, which is soluble in turpentine, but not in alcohol or mineral spirits. It can be used as a varnish or as a glossy painting medium in conjunction with vegetable oils, and is generally preferable to other resin-based varnishes, such as mastic varnish, as it retains its colourless appearance for a longer period of time. In encaustic painting, the inclusion of damar resin imparts toughness and gloss to the paint surface. Learn More

STAEDTLER's Mars Lumograph pencils are premium-quality pencils that have a special lead formulation containing a high proportion of carbon for matt, jet black results. The pencils are particularly suitable for drawing and hatching as well as for expressive sketches and portraits.

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Lapis Lazuli is a natural mineral pigment, mined in Afghanistan and South America. For many centuries it was the most reliable blue pigment available, and became particularly significant during the Medieval and Renaissance periods, when its inclusion in a work of art denoted the wealth and status of the patron, or the holiness of a painting's subject. In commercial paint production it has largely been replaced by the more affordable Ultramarine Blue, although it still has a place on modern palettes due to its unique soft violet tone. It is a transparent pigment, with a low tinting strength. Learn More

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Smalt is a kind of cobalt blue glass or frit, and its use as a pigment dates from the 1600s in the glass-making regions of Saxony. We offer two shades, light and dark, which are determined by the particle size of the pigment; the more finely ground the powder, the paler the colour. Before the introduction of Ultramarine Blue, Smalt was available in a wide variety of grades. It is a very transparent pigment, which is easily overwhelmed in mixtures due to its weak tinting strength. It works best in water based media. When ground in oil, it can become almost invisible in dried oil-paint films because its refractive index is so close to that of linseed oil.

Larger quantities are available by request.

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From the Winsor & Newton website: A slow drying oil which improves flow, increases gloss and transparency. Particularly suitable for use with whites and pale colours.

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Alumina Hydrate is an inert pigment with highly absorbent properties, which can be ground into oil paint as an almost colourless extender. It is often used as an additive in commercial oil paints, particularly in conjunction with transparent or lake pigments, as it provides stability and a homogenous consistency without effecting colour or gloss, although it may effect the pigment strength. When combined with linseed oil, it produces an almost transparent painting medium for extending oil colours. Sometimes referred to as Lake Base. Learn More

A strontium-based siccative, milder than cobalt driers. Add sparingly to oil colours to accelerate drying, particularly recommended for pale colours. Learn More

Gesso di Bologna is a bright white Calcium Sulphate, or gypsum, from Italy, which can be used as a substitute for whiting in the preparation of gesso. It is ground to a particularly fine powder, which makes it a suitable ground for gilding, as the small size of the particles allows for greater compression when burnishing. Learn More

Festal Icons, History and Meaning, by Aidan Hart. Learn More

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Smalt is a kind of cobalt blue glass or frit, and its use as a pigment dates from the 1600s in the glass-making regions of Saxony. We offer two shades, light and dark, which are determined by the particle size of the pigment; the more finely ground the powder, the paler the colour. Before the introduction of Ultramarine Blue, Smalt was available in a wide variety of grades. It is a very transparent pigment, which is easily overwhelmed in mixtures due to its weak tinting strength. It works best in water based media. When ground in oil, it can become almost invisible in dried oil-paint films because its refractive index is so close to that of linseed oil.

Larger quantities are available by request.

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- Made from extra soft synthetic fibres with an extraordinary elasticity and an extremely high colour absorbing capacity - Short black polished esagonal handles - Particularly suitable for watercolour and fluid acrylic colour - Extraordinary elasticity and extremely high colour absorption capacity - For watercolour and wash Learn More

Gypsum is powdered Calcium Sulphate, a traditional ingredient in gesso grounds used in southern Europe. One of the advantages of preparing your painting surface with gypsum is that it allows for a particularly even absorption of the paint film. It can also be added to acrylic primers to increase absorbency or add tooth to a surface. Learn More

Fullers Earth is used to remove plant debris and other impurities from cold-pressed linseed oil, as its large particle size and unusual shape attracts unwanted matter and pulls it down, away from the surface of the oil. Our Fullers earth consist sly of Bentonite.

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