Eco-Friendly Art Supplies UK: A Plein Air Painter's Guide to Safer, Lower-Impact Materials

There's something quietly contradictory about standing in an open landscape, surrounded by nature, while pouring white spirit into a jar and breathing in the fumes. Many outdoor painters reach a point where they start to wonder whether there's a better way. If you're looking for eco-friendly art supplies in the UK that actually work outdoors, this guide is here to help you sort through the options honestly.

This isn't about perfection or making you feel guilty about your current kit. It's about practical switches that make your outdoor sessions more pleasant, safer to handle, and a little kinder to the landscapes you're there to paint.

What "Eco-Friendly" and "Non-Toxic" Actually Mean

These terms get used loosely, and it's worth being clear about what they do and don't mean before spending any money.

"Non-toxic" in the context of artist materials generally means low or no volatile organic compounds (VOCs), no acutely hazardous ingredients, and compliance with relevant safety labelling. It does not mean zero risk. Even citrus-based solvents, often marketed as natural alternatives, require adequate ventilation and careful handling.

"Eco-friendly" covers a broader range of attributes: biodegradable ingredients, recycled or renewable content, low-impact production, minimal packaging. A product might score well on one measure and less well on another.

The most reliable reference point is always the Safety Data Sheet (SDS), not the marketing copy on the label. Reputable suppliers publish these; if they don't, that's worth noting.

The goal here is incremental improvement: a kit that's meaningfully safer and lower impact than a solvent-heavy traditional setup, without pretending that any artist material is entirely consequence-free.

The Best Eco-Friendly Plein Air Supplies to Try in the UK

Here's what's actually available to UK painters, broken down by medium and use case.

Natural Earth Oil Paints: The Most Complete Eco Option

The Natural Earth Paint range from Jackson's is the most genuinely considered eco oil painting system available in the UK from a mainstream supplier. These paints use natural earth and mineral pigments ground in plant oils, with no synthetic solvents required anywhere in the recommended painting method. For a plein air painter looking to move away from traditional oils and the solvent kit that goes with them, this is the closest thing to a complete alternative system.

The Complete Eco-Friendly Oil Paint Kit at £75.00 is a sensible starting point. It bundles a curated selection of earth pigment colours with enough to get painting immediately, and the price is competitive with a comparable quality oil starter set.

Jackson's

Natural Earth Paint : The Complete Eco friendly Oil Paint Kit

The Complete Eco Friendly Paint Kit From Natural Earth Paint Contains Everything You Need To Create Radiant Natural Oil Paints. The Set Includes Premium Quality Non-toxic Pigments, Refined Walnut Oil, A Plant-based Paint Thinner, And An Instruction Booklet. The Archival Quality P

Jackson's · £75.00

Be honest with yourself about the palette: earth pigments give you a naturally warm, muted range. Ochres, siennas, umbers, raw earth greens, and warm whites sit beautifully together. Vivid synthetic blues, cadmium-equivalent reds, and bright violets are largely absent. For landscape painting outdoors in the UK, this is far less limiting than it sounds. The colours you're working with in fields, hillsides, harbours, and woodland are almost entirely within this palette's reach.

The companion solvent for this system is Natural Earth Paint Eco Solve (£16.20), a plant-derived alternative to white spirit. It's a meaningful reduction in toxicity and VOC output compared to conventional solvents, but it still requires ventilation and careful disposal. Don't treat it as risk-free; treat it as a better option.

Jackson's

Natural Earth Paint : Eco Solve : 237ml

Natural Earth Paint Eco Solve Is An Eco-friendly, Plant-based Professional Paint Thinner For Thinning Paint, Cleaning Brushes, And For Restoring Old, Dried Brushes. It Is A Safe And Effective Alternative To Toxic Conventional Paint Thinners. Eco Solve Is Non-toxic And 100% Natura

Jackson's · £16.20

For field use, the more practical route is to avoid solvent entirely. Natural Earth Paint Walnut Oil Refined (£14.20) serves as both a painting medium and the core of a solvent-free brush-cleaning method. In the field, wipe as much paint as possible from your brushes onto a cloth, then work the bristles through a small amount of walnut oil to loosen the residue. You don't need to be fully clean before packing up; a thorough wash with soap and water at home finishes the job. It's a clean, simple system that fits neatly into a compact plein air bag.

Jackson's

Natural Earth Paint : Walnut Oil (Refined) : 237ml

Natural Earth Paint Walnut Oil (Refined) Is A Medium For Oil Painting As Well As A Binder To Mix With Pigments To Make A Smooth, Rich Oil Paint. This Slow-drying Oil Is Less Yellowing Than Linseed Oil And Is Ideal For Mixing With Pigments, Thinning Mixed Paint, Cleaning Brushes,

Jackson's · £14.20

One practical note for UK painters: walnut oil can thicken slightly in cold temperatures. In autumn and winter, keep the bottle in a coat pocket for a while before use and it'll flow normally.

Water-Mixable Oils: The Easiest Switch for Oil Painters

If you're already painting in oils and want to reduce or eliminate solvents without changing much else about your practice, water-mixable oils are the most straightforward upgrade available.

These paints use a modified linseed oil binder that allows them to disperse in water, meaning you can thin them, blend mediums, and clean brushes using nothing but water in the field. The handling is very close to traditional oils, though experienced painters often notice a slight difference, particularly in how they respond to water versus solvent. Most adapt quickly within a session or two.

Cobra Artist Water-Mixable Oil Paint (from £5.70 per tube, Jackson's) is the most accessible entry point in the UK: good pigment quality, broadly available, and close in price to mid-range artist oils. Schmincke Norma Blue (from £8.20) is the premium option, with noticeably rich pigment load and smooth handling. Lukas Berlin (from £11.20 for larger tubes) is worth considering if you work at a larger scale or go through paint quickly.

Water-Mixable Oils Worth Trying

Cobra : Artist Watermixable Oil Paint

£5.70 · Jackson's

Schmincke : Norma Blue : Water Mixable Oil Paint

£8.20 · Jackson's

Lukas : Berlin : Water-Mixable Oil Paint : 200ml : Titanium White

£11.20 · Jackson's

All three are stocked by Jackson's; Cobra is also available at Ken Bromley, Cass Art, and Great Art, which makes it easy to pick up in a hurry. These aren't niche products: they're used by professional painters and taught in art schools, so you're not compromising on quality to make the switch.

Eco-Friendly Acrylics for Plein Air

Acrylics are already a relatively low-toxicity medium for outdoor painting: water-based, no solvents required, and straightforward to clean up. The Natural Earth Paint Acrylik range (from £13.10, Jackson's) takes this further by using natural pigment bases, giving a more muted, earthy character than standard synthetic acrylics.

Jackson's

Natural Earth Paint : Acrylik Paint

Acrylik From Natural Earth Paint Is A Plant-based, Eco-friendly, And Lightfast Paint That Behaves Exactly Like Conventional Acrylic Paint.This Water-based Paint Is Highly Pigmented With A Medium Body Consistency. It Is Made With A Plant-based Resin, Natural Or Non-toxic Pigments,

Jackson's · £13.10

If you already paint outdoors in acrylics, this range is worth exploring if you want more harmonious, landscape-tuned colour. Be aware that acrylics dry fast in warm conditions, which can be a frustration outdoors on a sunny UK day, though cool, overcast weather (which is most of the time) actually helps.

One environmental trade-off with all acrylic paints is worth knowing: when you wash brushes and equipment, acrylic particles enter the water system as microplastics. In a studio with a sink, this is difficult to avoid entirely. Outdoors, it's better practice to carry a small sealed container for dirty water and dispose of it at home through the drain rather than tipping it directly into the ground or a waterway.

Natural Watercolour: The Lowest-Impact Option

Watercolour is already the most environmentally benign medium for outdoor painting. Minimal waste, water-based, compact enough to fit in a jacket pocket, and the pigment quantities involved are tiny compared to oils or acrylics.

The Natural Earth Paint Natural Watercolour Kit (£53.00, Jackson's) takes an already low-impact medium further with earth and mineral pigment bases. If you're new to eco-friendly materials and want a simple starting point, this is it.

Jackson's

Natural Earth Paint : Natural Watercolor Kit

The Natural Watercolour Kit From Natural Earth Paint Contains Everything You Need To Create Natural And Professional Quality Watercolour Paints That Are Free Of Toxic Preservatives, Additives, Heavy Metals, And Petroleum-based Pigments. The Set Includes Premium Quality Non-toxic

Jackson's · £53.00

It's worth saying that standard artist-quality watercolours from established manufacturers are also broadly low-toxicity and low-impact in field use. The Natural Earth Paint kit is for painters who want to go further with natural pigment sourcing, not a necessary switch for everyone.

Eco-Friendly Surfaces and Supports

The support you paint on has an environmental footprint too. A few practical options for UK plein air painters:

FSC-certified watercolour papers are widely available from Jackson's and Ken Bromley; Fabriano publishes sustainability credentials for several of their paper ranges. If you're using stretched canvas or panels, look for plywood panels (less processed than MDF, which produces toxic dust when cut) or reclaimed timber prepared with a natural ground.

For priming panels and boards with a lower-impact alternative to conventional gesso, Natural Earth Paint Eco Gesso Kit (£56.00, Jackson's) is plant-derived and water-clean-up-friendly.

Jackson's

Natural Earth Paint : Eco Gesso Kit

The Natural Earth Paint Eco Gesso Kit Contains Everything You Need To Make Eco-friendly, Vegan Gesso. Based On Renaissance Recipes, The Gesso Is Made With Earth And Mineral Ingredients And Plant-based Binders. It Is Professional Grade And Archival. Natural Earth Paint Is A US-bas

Jackson's · £56.00

Practical Tips for a Non-Toxic Plein Air Kit in the Field

Getting this right outdoors is slightly different from making the same switches in a studio. Here's what actually matters when you're away from a sink and a bin.

Dirty water: Never tip waste water from acrylic or watercolour sessions into natural water sources, hedgerows, or onto paving where it can reach surface water. Carry a small lidded container for dirty water and dispose of it at home. For watercolour, the quantities are small enough that you can allow the container to settle, then dispose of dried pigment as solid waste.

Paint rags: Take a sealable plastic bag for used rags. Rags soaked in oil-based mediums, including plant oils, can present a fire risk if scrunched up and left to dry in a sealed space. Open them out flat when you get home to dry safely before disposal.

Solvents in the field: If you're using Eco Solve or any other plant-based solvent, keep it in a small, well-sealed container. Don't leave jars open in the field; even lower-toxicity solvents produce vapour.

Cold weather: Walnut oil and plant-based mediums can thicken in cold temperatures, which is relevant for autumn and winter painting sessions in the UK. Keep your medium bottle warm in a pocket and it should remain workable.

Are the Trade-Offs Worth It? An Honest Assessment

Here's the straightforward version, without the greenwashing.

Colour range: Earth pigment ranges are genuinely more limited. If you paint bright florals, vivid urban scenes, or work with strong synthetic blues and violets, you'll feel the constraint. For UK landscape painting in the field, the limitation is much smaller than it looks on paper: the palette naturally suits skies, greens, earth tones, and the muted light of British countryside.

Handling: Water-mixable oils are close enough to traditional oils that most painters adapt within a session. The main difference is that water thins them more aggressively than solvent, so use it sparingly. Natural earth oils have a slightly softer, occasionally more matte quality when dry, which many painters find they actually prefer for outdoor work.

Drying time: Earth pigments in plant oils dry comparably to traditional oils. In cool UK conditions, don't expect any dramatic difference in either direction.

Price: Eco-specific products often carry a small premium. The Natural Earth Oil Kit at £75 is reasonable for what it includes. Cobra water-mixable oils are close in price to mid-range artist oils. The uplift is real but not prohibitive.

Performance: These are not beginner or compromise materials. Artist-grade eco products from established makers hold up to professional use. The Natural Earth Paint range is particularly well-regarded for quality.

Where to Buy Eco-Friendly Art Supplies in the UK

Jackson's Art is the best-stocked UK source for the Natural Earth Paint range, and also carries Cobra, Schmincke Norma Blue, and Lukas Berlin water-mixable oils. If you're ordering the Natural Earth Paint products, Jackson's is essentially the primary UK route.

Ken Bromley has good stock of water-mixable oils, particularly Cobra, often at competitive prices, and stocks a solid range of papers and supports.

Cass Art is useful if you want to see products in person before buying, and carries acrylics and some eco-friendly lines in store.

Great Art UK has a broad range of water-mixable oils and is often competitive on price, worth checking if you're buying in larger quantities.

One practical note: Natural Earth Paint products can vary in stock availability at Jackson's. It's worth checking before ordering, particularly for the kits, which occasionally sell out.

Making this switch doesn't require replacing your entire kit at once. Starting with a small set of water-mixable oils, or swapping your solvent for walnut oil and a cloth, is enough to notice a real difference in how your outdoor sessions feel. From there, you can go as far as you want.