Paint straight from the tube is only the beginning of the story. Mediums are the part of the process where artists start bending paint to their will; slowing it down, speeding it up, thickening it into sculptural texture, or turning heavy colour into soft transparent glazes. They’re kinda like secret machinery quietly working behind the scenes of great paintings.
At Art Shed, artists can explore professional acrylic, oil, and watercolour mediums from trusted names like Liquitex, Winsor & Newton, and Matisse. Retarders, flow improvers, modelling pastes, pouring mediums, varnishes. Whatever strange and specific thing you need your paint to do, there’s probably a bottle for it.
Manipulate Drying Time and Flow to Work at Your Own Pace
Every paint medium has its own rhythm. Acrylics dry quickly, and oils famously … do not. Mediums let artists interfere with that natural behaviour and customise the process to suit the way they work.
Retarders slow acrylic drying time and create longer blending windows, making smooth colour transitions and softer gradients far easier to achieve. Drying mediums for oils speed things up from the opposite direction, helping artists layer work faster instead of hovering dramatically over wet paint for the next several business days.
Flow improvers and thinning mediums also change the way paint physically moves across the surface. Brushstrokes soften, glazes settle more evenly, and colours travel with far less resistance. Tiny changes in consistency can completely reshape the final outcome of a painting.
Add Texture and Finish with Gels, Pastes, and Varnishes
Some mediums are built less for movement and more for pure texture. Heavy gels and modelling pastes create raised surfaces, dramatic palette knife marks, and sculptural effects that pull paintings away from feeling completely flat.
Varnishes step in at the very end of the process. Gloss finishes deepen colour and bounce light around the surface, satin creates a softer balance, and matte varnishes reduce glare entirely. They also help protect finished artwork from dust, moisture, and general studio chaos, which turns out to be surprisingly important once paint starts surviving longer than a week on the easel.
FAQs
What is a painting medium and why do I need one?
Painting mediums change the behaviour of paint. Some alter drying time, some improve flow, some add texture, and others protect the final artwork with different finishes and varnishes.
How do I slow down the drying time of my acrylic paints?
Retarders and slow-drying acrylic mediums extend blending time and help prevent paint from drying too quickly on the palette or canvas.
Can I use oil painting mediums with acrylic paints?
No. Oil and acrylic mediums are designed specifically for their own paint systems, so it’s important not to mix them across mediums.