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Can mediums be used with Designers Gouache?

There are a number of acrylic mediums in both gloss and matt variations that can be used with Designers Gouache. However, we recommend experimenting with your chosen medium and colour before committing to a painting.

There are several factors to consider:

  • Each colour should be tested by mixing it with the medium and leaving it to dry. There may be a colour reaction between some of the pigments and the medium due to the alkalinity of the acrylic resin. This is most likely to occur with pinks, violets and magentas.
  • There may also be a chemical reaction when mixing the medium and colour. Beware of any granular or gelatinous effects which may occur, again due to the alkalinity of the resin.
  • If you wish to maintain the characteristics of gouache paint, keep the amount of medium to a minimum. If you add too large a proportion of medium this will give the colour a “plastic” look.
  • Using acrylic mediums, particularly the gloss medium, will increase the transparency of gouache.
  • Water resistance can be achieved by adding small amounts of Acrylic Matt Medium to your Designers Gouache colour.
  • It is also possible to use Acrylic Gesso Primer with Designers Gouache. This will ensure the absorbency and film stability expected for permanent works of art.

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