Marcus Chen
Paint is the prevailing medium in art history, with its versatility allowing artists to create in a wide range of styles and techniques. The three basic ingredients of paint are pigment, binder, and vehicle. The pigment provides colour, the binder is a sticky substance that holds the pigment particles together and attaches it to the surface, and the vehicle is the liquid that carries the pigment and binder, making the paint easier to apply. Oil paint, for example, uses pigment mixed with a binder of linseed oil, with linseed oil, mineral spirits, or turpentine acting as the vehicle. Acrylic paint, on the other hand, uses an acrylic polymer emulsion as a binder and water as the vehicle.
| Characteristics | Values |
|---|---|
| Pigment | Provides colour to the paint |
| Binder | Holds the pigment particles together and attaches them to the painting surface |
| Solvent | Used to thin the paint and make it easier to apply |
| Vehicle | Makes the paint a liquid and can be added to the paint for thinning |
| Drying oils | Oils that naturally form a hard film when they absorb oxygen |
| Resin | Tree resins dissolved in turpentine add gloss to the paint and decrease drying time |
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What You'll Learn
Pigment provides colour to the paint
Paint is made up of three basic ingredients: pigment, binder, and solvent. Pigment is the substance that gives colour to the paint.
Pigments are compounds that are intensely coloured and are used to colour other materials. They are insoluble and are applied not as solutions but as finely ground solid particles mixed with a liquid. The same pigments are generally used in oil- and water-based paints.
Pigments are either organic or inorganic. Organic pigments contain carbon and are derived from natural sources or synthetic sources such as coal tars and other petrochemicals. Natural organic pigments have been used for centuries, but most pigments used today are synthetic organic pigments. Inorganic pigments are made through simple chemical reactions, notably oxidation, or are found naturally as earths. They are brighter and last longer than organic pigments.
Organic pigments include azo pigments, which contain a nitrogen group and account for most organic red, orange, and yellow pigments. Copper phthalocyanines are another example of organic pigments, providing strong blues and greens that are unusually colourfast for organic colours.
Inorganic pigments include white opaque pigments, which are used to provide opacity and to lighten other colours. Ultramarine pigments, titanium dioxide, and iron oxide pigments are also inorganic pigments.
Pigments can be derived from a variety of natural sources. For example, the pigment Carmine Red Lake, derived from the cochineal insect, was used by Tintoretto in his painting Miracle of the Slave (c. 1548) to achieve dramatic colour effects. Ochre, the first colour of paint, is an iron oxide that was mined in the city of Siena, Italy. A favoured blue pigment was derived from lapis lazuli.
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Binder holds pigment particles together
Paint is composed of three main ingredients: pigment, binder, and solvent. Pigments are the granular solids that provide colour to the paint. Binders are the sticky substances that hold the pigment particles together and attach them to the painting surface. Solvents are used to thin the paint and make it easier to apply.
Binders are crucial for ensuring the adhesion of paint to surfaces. They are the film-forming agents that hold the pigment in place once the paint is applied. The binder, often referred to as the vehicle, is essential for the paint's adhesive qualities. It is the liquid substance that binds the pigment particles together and ensures they adhere to surfaces after the paint has dried. Binders can be made from various materials, including natural and synthetic resins, such as linseed oil or acrylic polymers.
The role of binders in paint can be understood through the process of paint drying. Water-based paints dry through a two-step process: the water evaporates, and the binder starts to tug the pigment particles together to form a solid coating. Oil-based paints, on the other hand, "cure" by reacting with oxygen in the air to harden. This process is slower and allows artists to blend colours and make changes during painting.
The choice of binder can significantly impact the paint's characteristics, including drying time and finish. For example, linseed oil, a common binder in oil paints, yellows over time, while other resins like damar or Venice turpentine are less prone to discolouration. Binders also determine the paint's resistance to environmental factors, such as light and heat.
In summary, binders are essential in paint as they hold the pigment particles together, facilitate adhesion to surfaces, influence drying times, and contribute to the overall durability and finish of the paint.
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![Chelsea Classical Studio Linseed Oil Paint Medium - Cold Pressed Extra Pale Naturally Clarified De-Yellowed by Natural Processed Linseed Oil - [2 oz. Bottle]](https://m.media-amazon.com/images/I/61s773Hu-EL._AC_UL320_.jpg)
Vehicle/Solvent makes paint a liquid
The three basic ingredients of a painting medium are pigment, binder, and solvent. Pigments provide colour, binders hold the paint together and adhere it to the surface, and solvents help to adjust the paint's viscosity for application. The binder (resin) and solvent together are sometimes known as the vehicle.
The vehicle or solvent makes paint a liquid and can be added to the paint for thinning. It is a vital ingredient in painting mediums as it helps attain the desired consistency needed for the application of the paint. Solvents are liquids that are volatile in nature and are used to dissolve the resin component in paints. They are also used to clean and separate materials.
The evaporation rate of the solvents is important as a higher rate would guarantee a faster-drying process. A good solvent should be nontoxic, less costly, and have a tolerable odour. Solvents are widely used in industrial automotive painting as they guarantee a fine finish with a consistent coating free of lumps, enhancing the visual appeal.
The type of solvent used can determine the maximum or minimum results. Solvents with better solubility characteristics in line with a given formula or paint or coating will yield better results. Common solvents include hydrocarbon solvents, ketones, esters, ethers, and alcohols. Hydrocarbon solvents are the best option for a rapid drying process due to their low flashing point.
For oil-based products, mineral and white spirit solvents are recommended. Naphtha solvents, extracted from petroleum, are perfect for industrial use as they are highly dissolvable. For oil-based systems, spirits of turpentine, extracted from tree resins, are used.
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Drying oils add richness and depth
The three basic ingredients of a painting medium are pigment, binder, and solvent. The pigment provides colour, the binder is a sticky substance that holds the pigment particles together and attaches them to the painting surface, and the solvent is used to thin the paint and make it easier to apply.
Drying oils are a type of binder used in oil painting. They add richness and depth to a painting by altering its viscosity, surface finish, and drying time. Linseed oil is the most commonly used drying oil in oil painting mediums. It is created by leaving linseed oil in the sun to thicken. Linseed oil creates the strongest film once it has dried, and paintings done with linseed oil have survived hundreds of years. However, linseed oil yellows significantly over time, especially when left in the dark.
Other types of drying oils include safflower oil, poppy oil, and walnut oil, which have similar characteristics but vary in drying rates, wetting abilities, and yellowing effects. For example, walnut oil and poppy seed oil are slower drying than linseed oil, so they are optimal for final layers or working alla prima over a long period. Additionally, walnut oil is the most "white" or clear painting oil, and some brands mix every colour with walnut oil. Safflower oil is less yellow than linseed oil and is sometimes used when making white paint.
The use of drying oils allows artists to control their paint, add variety to their mark-making, and broaden their technique by giving them more paint possibilities. Artists can modify their paint with a medium to vastly change the handling properties of the paint. For example, mediums can increase flow, add texture, increase transparency, or change the drying time.
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Resin adds gloss and decreases drying time
The three basic ingredients of a painting medium are pigment, binder, and solvent. Pigment provides colour, binders hold the paint together and adhere it to the surface, and solvents help adjust the paint's viscosity for application. Resin is a versatile medium used in painting to add gloss and decrease drying time.
Resin is a popular method for achieving a high-gloss look in artwork. It refers to the smooth, shiny, and reflective surface that adds depth and dimension to a piece. The glossy effect can elevate the artwork's overall visual impact, making colours appear more vibrant and creating a sense of depth. While traditional resin application can deliver a high-gloss look, it has drawbacks such as high cost, strong fumes during application, and extended curing time.
To achieve a resin gloss finish, one must start with a shiny mould template. The easiest way to make your favourite castings glossy is to use a shiny mould. Before casting in the mould, check if the surface is shiny. If the answer is no, it is unlikely to obtain shiny castings. For instance, soap moulds are not shiny, so you won't get a polished epoxy resin gloss finish.
Resin is also used to decrease drying time. Depending on the kind of resin used, getting it to dry (or cure) can vary. Cure times differ between resins, and factors such as room temperature and the amount of hardening agent used can affect how fast your resin cures. For instance, increasing the temperature or moving the piece to a warmer space can decrease curing time. Additionally, pre-warming the resin and hardener in a hot water bath can help speed up curing.
There are also fast-curing resins available that dry faster than regular resins. However, slow-curing resins can be advantageous, as they tend to be stronger and more water-resistant than fast-curing resins, and they allow more time to work with the resin while it's still soft.
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Frequently asked questions
The three basic ingredients of a painting medium are pigment, binder, and solvent/vehicle.
Pigment provides colour. Binder is a sticky substance that holds the pigment particles together and attaches them to the painting surface. Solvent/vehicle is used to thin the paint and make it easier to apply.
Oil paint uses pigment mixed with a binder of linseed oil. Linseed oil can also be used as the vehicle, along with mineral spirits or turpentine.
Acrylic paint uses an acrylic polymer as the binder and water as the vehicle. Tempera paint uses egg as a binder and water as the vehicle.
![Chelsea Classical Studio Linseed Oil Paint Medium - Cold Pressed Extra Pale NaturAlly Clarified De-Yellowed By Natural Processed Linseed Oil - [16 oz. Bottle]](https://m.media-amazon.com/images/I/51o4xX5uDqS._AC_UL320_.jpg)
