Priya Kapoor
Paint mixing is the practice of combining paint components or colours to achieve a desired hue. Artists typically mix paints using a palette knife on a palette, which serves as their workbench. The choice of pigments depends on the artist's subjective preference of subject, style, and material considerations. Artists may use a limited palette of primary pigments, often between four and eight, that can be physically mixed to create any desired colour. Acrylic artists' paints, for example, can be thinned with water or acrylic medium and used as washes.
| Characteristics | Values |
|---|---|
| Number of pigments used | Between four and eight primary pigments |
| Choice of pigments | Depends on the artist's subjective preference of subject and style of art, as well as material considerations like lightfastness and mixing heuristics |
| Common palettes | Zorn palette (white, red, yellow, and black pigment) |
| Tools | Palette or painting knife |
| Techniques | Mixing "mother" puddles of colors needed for the painting |
| Cleaning | Keep the palette's mixing area tidy and clean to avoid unwanted muddy passages in a painting |
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What You'll Learn
Artists use a limited palette of primary pigments
Artists have used a limited palette of primary pigments to mix paint since ancient Greece. There is no consensus on a specific set of pigments that are considered primary colours. The choice of pigments depends on the artist's subjective preference of subject and style of art, as well as material considerations like lightfastness and mixing behaviour. Artists typically rely on mixing experience and "recipes" to mix desired colours from a small initial set of primaries and do not use mathematical modelling.
The primary colours in pigment form are types of blue, red, and yellow. They are cyan, magenta, and yellow. With these three primaries, artists can still only achieve a limited range of colours. This is why many artists start with a limited palette, then add colours they would not otherwise be able to mix from the primaries, such as crimson.
A chromaticity diagram can illustrate the gamut of different choices of primaries, for example, showing which colours are lost (and gained) if you use RGB for subtractive colour mixing (instead of CMY). Contemporary classical realists have often advocated that a limited palette of white, red, yellow, and black pigment (often described as the Zorn palette) is sufficient for compelling work.
Using fewer pigments to create a wide variety of colours is a great training exercise. Artists can learn about colour and the relationship between different objects and their corresponding values from mixing different tones and hues from scratch. It forces them to plan the composition of their piece in relation to the colours they are using, thinking carefully of each tone and value transition.
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Mixing experience and recipes are key
Mixing paint is a complex process that involves combining pigments to achieve a desired hue. Artists typically rely on their experience and "recipes" to mix colours from a small initial set of primary pigments. This process is often subjective, depending on the artist's preference, style of art, and material considerations.
While there is no definitive set of primary pigments, a common approach is to use a limited palette of between four and eight colours that can be physically mixed to create the desired shade. This could include colours such as white, red, yellow, and black, often referred to as the "Zorn palette", which is favoured by contemporary classical realists.
The process of mixing paint involves creating mother puddles of colours that will be needed in the painting. These puddles are then adjusted to create the specific shades required for each element of the painting. For example, when painting a red apple, a mid-tone red puddle is mixed and then divided to create a darker shadow side and a lighter light-struck side.
To ensure clean colours, it is essential to keep the palette and mixing area tidy. Artists should scrape and wipe the area clean between mixtures to avoid contamination from other paints. Additionally, it is important to place enough paint on the palette, as a small dab will not be sufficient for proper mixing.
Overall, mixing paint is a skill that combines experience, recipe knowledge, and an understanding of colour theory to create the desired hues for a painting.
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Different types of paint require different tools
Mixing large volumes of paint can be a complex task, and different types of paint require different tools and methods. For instance, 2-component paints, which are commonly used in bodywork and require mixing with a hardener, demand specific preparation. The mixing area must be clean and well-ventilated, and the painter must wear PPE such as coveralls, latex gloves, protective goggles, and an FP2 certification face mask or higher.
The choice of tools depends on the type and volume of paint being mixed. Small volumes of paint can be mixed by hand with a manual mixer or stir stick, but larger volumes require electric mixers with more power. Electric mixers are more efficient for bigger projects, as they can handle larger volumes with ease and ensure consistent and thorough mixing. Additionally, the viscosity of the paint should be considered, as thicker paints need more robust tools. Emulsion paint mixers, for example, come in various types, from handheld models to larger industrial machines, and they guarantee a uniform blend of pigments and solvents, preventing streaks and uneven coverage.
The application method also varies depending on the type of paint. Spraying is a prevalent technique due to its versatility and economic viability, but it can result in paint loss. Air-atomized technology, a conventional approach, has poor transfer efficiency and can expose workers to dangerous levels of airborne chemicals. HVLP spray equipment, on the other hand, propels large quantities of low-pressure air, resulting in less overspray and blowback. Dipping is another method, but it is not suitable for larger components due to the prohibitive cost of larger tanks.
Furthermore, the mixing process itself can differ based on the paint's composition. For instance, blacklight paint, invented by the Switzer brothers, involves mixing fluorescent compounds with shellac. Acrylic artist paints can be thinned with water or acrylic medium but are not rehydratable once dry. Thus, artists must consider the unique characteristics of the paint they are using to determine the appropriate tools and methods for mixing and application.
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The function of the paint determines its components
The function of paint determines its components. For instance, a painter of portraits or scenery on a canvas may seek delicate hues and subtle gradations, whereas a house painter may prioritise durability and consistency of colours, and a painter of a bridge or ship may prioritise weatherability.
Paint generally consists of four main ingredients: pigments, binders, solvents (liquids), and additives. Pigments are finely ground particles that give paint its colour. There are two primary types of pigment: organic and inorganic. Organic colourants like hansa yellow and phthalo blue provide brighter colours. Titanium dioxide (TiO2) is the most costly pigment, providing whiteness and contributing directly to a paint's wet hide.
Binders are ingredients that provide a binding effect, holding the pigments together to create a dry film on the surface. Binders are key to a paint's performance, including adhesion, washability, scrub resistance, fade resistance, gloss retention, and gloss or durability. Traditional binders like alkyds will yellow in light colours and are prone to oxidation and chalking when used on exterior surfaces. Newer technologies, such as alkyd emulsions, address these issues.
Solvents, or liquids, act as a vehicle for the paint, allowing it to flow and get from the can to the surface. Water is the main solvent for water-borne paints, while solvent-borne or oil-based paints use various combinations of organic solvents as thinners.
Additives are additional components that do not significantly alter the percentages of individual ingredients. They can include thermochromic or photochromic materials, which change colour when heat or light energy is applied or removed, or halochromic compounds, which change colour when the paint dries.
The choice of pigments and other components depends on the artist's subjective preference of subject, style, and material considerations like lightfastness and mixing heuristics. Artists typically rely on mixing experience and "recipes" to achieve their desired colours from a small initial set of primaries.
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Artists use mother puddles of colours
Artists use "mother puddles" of colours to create large volumes of paint with a harmonious look. The mother colour technique involves using one colour that is incorporated into every other colour in a painting. For instance, if you're painting a snowy landscape, your mother colour would be white, and you would mix that white into all of your other colours. This method can be used with almost any type of painting, from watercolour to plein air.
The mother colour is chosen to reflect the overall theme of the painting. It can be any colour, but it is often best to choose the focal point colour. For example, if you were painting the ocean on a cool day, you might choose blue or blue-violet as your mother colour. The mother colour can be used as a dominant colour in the painting or less prominently. It can be mixed into every colour you create or used as the starting point for other colours by mixing another colour into some of the mother colour.
Artists typically rely on mixing experience and "recipes" to mix desired colours from a small initial set of primary colours. There is no specific set of pigments that are primary colours; the choice of pigments depends entirely on the artist's subjective preference of subject and style of art, as well as material considerations like lightfastness and mixing heuristics. Contemporary classical realists often advocate for a limited palette of white, red, yellow, and black pigment, known as the "Zorn palette".
To create a mother puddle, artists start by mixing a generous puddle of the mid-tone mother colour. This puddle is then divided in half, with one half darkened and the other lightened to create the shadow and light-struck sides of the object being painted. After each mother puddle is mixed, they are scooped up with a knife and placed in a row below the squeezed tube colours. It is important to keep the palette's mixing area clean to prevent future mixtures from being contaminated with other mixed paints.
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Frequently asked questions
Paint mixing is the process of combining paint components or colours to achieve a desired hue.
Artists use a palette or painting knife to mix paint.
Artists typically rely on mixing experience and "recipes" to mix desired colours from a small initial set of primary colours. They do not use mathematical modelling.
It is essential to squeeze enough paint from the tube to allow for the mixing of additional puddles of paint. A small dab of paint will not suffice.
It is important to keep the palette clean and set it up the same way for every painting session. Artists should also scrape and wipe the mixing area clean often to avoid contamination with other mixed paints.
