Those who favour working in acrylics are often attracted by the myriad ways the paint can be manipulated with the use of mediums. Acrylic mediums and gels are made using the same acrylic resin binders that manufacturers use in making paint, to which various other materials including marble dust, stone and mica are added in order to alter the consistency and behaviour of the medium which in turn will manipulate the paint when the medium is mixed with it. Jackson’s Artist Acrylic range includes a number of gels and mediums which are described below, and we also sell acrylic mediums by Golden, Liquitex, AV, Daler Rowney, Winsor & Newton, Lascaux and Ara. Acrylic painters really are spoilt for choice at Jackson’s Art Supplies!
Acrylic Gel Medium
Acrylic gel medium is available in Daler Rowney (known as ‘Impasto Gel Medium’), Jackson’s, Golden (known as ‘Heavy Gel’ and is available gloss, matt or semi-gloss), and AV. Jackson’s Acrylic Gel Medium is made from acrylic polymer emulsion, and is of a heavier viscosity that the Jackson’s Artist Acrylic. By adding this medium to your colour you will extend the colour, increase its transparency, and slow the drying time a little. Gel medium is particularly good for heavy impasto techniques. Golden also do a ‘Regular Gel’ in gloss, matte or semi-gloss, and this is of a similar consistency to Golden Heavy Body Acrylic but still may be thicker than some other acrylic colour ranges. (Please note that brands can be mixed).
Acrylic Flow/Fluid Medium
These mediums will thin heavy body acrylic colour, but are usually of a similar consistency to fluid colour. They extend the colour and increase the transparency. It is worth checking each individual brand with regard to how they affect the drying time – AV’s does not alter the drying time because it is made using the same acrylic emulsion as the paint itself. Jackson’s and Golden also do their own versions of this product.
Jackson’s, AV and Golden all offer retarders as part of their acrylic medium ranges. These slow the drying time right down, and also extend the colour and increase its transparency. It is advised not to mix more retarder than 10% of the colour you are mixing with as this will weaken the bonds between the acrylic polymer particles in the paint too much and cause instability in the dry acrylic paint film.
There are so many other mediums and gels to explore, so if you are interested in really making unique paintings then it is worth having a look. There are mediums to make paint appeared cracked and aged, mediums to make paint stringy, sandy, gritty, pearlescent, pasty…there are gels to alter consistency, reduce brush marks, increase brush marks, increase gloss and decrease gloss. Experiment where you can, you might even want to mix mediums and see what other possibilities there are.