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Hints, Tips & Techniques for Acrylics - Mediums

Click on the headings below to find out more about using mediums with acrylic colour.
 
Changing consistency and finish
Slowing the drying
Adding texture
Avoiding overthinning

Mediums are used to create an even wider variety of techniques and effects and to prevent overthinning. By changing consistency and finish acrylics can be safely altered to a very large number of different consistencies, from a thin fluid to a thick gel. Each consistency is available in either matt or gloss.

Galeria Mediums

Changing the consistency and finish

General Purpose
Acrylic Matt Medium or Acrylic Gloss Medium maintain the consistency of the colour whilst improving flow and transparency. Colours will remain usable slightly longer when mixed with medium.

Acrylic Flow Improver improves flow without any loss in colour strength. This helps the application of flat, even areas of colour.

Acrylic Matt Medium / Acrylic Flow Improver

Glazing and Staining
Acrylic Matt Medium or Acrylic Gloss Medium can also be used for glazing and staining techniques. The results are much more stable than when thinning with water alone (see avoiding overthinning). Acrylic Flow Improver increases the staining of raw canvas.

Acrylic Gloss Medium

Brushwork texture and impasto
Acrylic Matt Gel Medium or Acrylic Gloss Gel Medium thicken the consistency of the colours, accentuating brush marks and textures in the painting. Impasto Medium thickens the colour even more and is particularly good for palette knife work.

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Slowing the drying

If the acrylic is drying a little too quickly for you, Acrylic Retarder can be mixed with the colour. This gives more blending time for example on the canvas or slower drying on the palette. Acrylics Palettes can also be used to keep the colour usable for days.

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Adding Textures to Acrylics

The fast drying and adhesive nature of acrylics make them ideal for building up layers of colour using the added texture of mediums for a unique range of effects. Mediums are available with added natural textures like sand and flint and a range of transparent textures from fine to coarse.

In paintings, landscapes and buildings work particularly well with the added texture. Texture gels and natural texture gels also have infinite craft applications, from stencilling to model making.

Galeria Glass Beads Texture Gel / Galeria Heavy Structure Gel

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Avoiding overthinning

Water is used to dilute acrylic colour and clean brushes and palettes after painting. However too much water causes overthinning. As the water thins the acrylic colour by diluting the acrylic binder, if too much is used there will be insufficient binder remaining to bind the pigment. A matt or uneven finish will appear on the painting and the work will be susceptible to scuffing and damage. Overthinning is avoided by the use of mediums in addition to water.

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