Blog Post



Oil painting means serious stuff. It was used by the old masters long ago and is still used by professional painters today. You’re not usually allowed to go near oil paints at school (think of the stains!) and so when you decide to take the plunge and start painting with the most highly regarded of paints, they can be something of a mystery.

As part of our Paint Light Colour campaign, we want to demystify oil painting mediums, by explaining the uses of our best-selling Winsor & Newton and Michael Harding mediums.


Mediums are used to adapt the consistency drying time and finish of your painting. You can achieve a variety of different shins and either extend or shorten the drying time of the paint, depending on which you use. You can mix them directly with the paint on your palette, or dip your brush into them as you would with water.

TOP TIP: Mixing

Most oil mediums are naturally tinted a slightly yellow colour which means you need to be cautious when mixing them with lighter colours. Over time they can tinge your paintings yellow too, so just be mindful of how much you use when mixing with your paint.


Turpentine is technically a solvent and one of the more traditional ones that painters use. It speeds up the drying time as it dilutes the paint and evaporates off of it (the equivalent of water for acrylic paint, if you like.)

The Winsor & Newton Distilled Turpentine is great for thinning your oil paint as well as cleaning your brushes. It’s the multi-tasking tool needed in every oil painter’s studio.

When painting in layers, you should use turpentine for your basecoat or first layer of paint, as you should always apply your fast-drying layers first.


This is the most popular form of oil medium. It slows down the drying time of the paint, and when painting in layers, this can be very useful. Apply the ‘slow over fast rule’ – paint your fast-drying layers first, and then each layer on top should take longer to dry than the previous one. You can therefore apply more of this medium with each layer.

The Winsor & Newton Refined Linseed Oil increases gloss and transparency as well as smoothing the consistency of oil paint.

There is also a Cold Press Linseed Oil by C Roberson, which is a high quality oil often used when grinding pigments, to create oil paint at a professional level. It dries more slowly than Refined Linseed Oil, taking up for four days, and has a shinier and harder finish. 


The Winsor & Newton Liquin Original Medium is one of the best-selling mediums at Cass Art. It speeds up drying time, which we all know can be a bonus, and halving the drying time of your painting. It also brings a silky consistency to your paint, giving the surface a glossy finish. Another advantage is that it doesn’t affect the colours of your paint.

The Winsor & Newton Liquin Impasto is ideal if you use a really thick application of paint. So if you work with a luscious, thick impasto (we’re thinking van Gogh’s Starry Sky) but if you can’t wait years for the painting to dry then this is the medium for you. Once mixed it can hold the texture of the brush marks in the paint, it speeds up the drying time, and also adds a glossy finish.

Related posts

Copyright © 2022 VPS-HOST | All Rights Reserved.