Can Designers Gouache be mixed with Acrylic/Acrylic mediums?
Winsor & Newton produce a number of acrylic mediums in both gloss and matt variations. There are three points to make concerning their use in combination with Designers gouache. Firstly, 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 together, beware of any granular or gelatinous effects which may occur, again due to the alkalinity of the resin. Secondly, if the maintainance of the characteristics of gouache is required, keep the addition of the medium to a minimum. A large proportion of medium will result in a ‘plastic’ look to the colour. Thirdly, their transparency will be increased, particularly if using the gloss medium.
