Quick answer: To store oil paint on a palette, cut off its air supply and keep it cool. For overnight breaks, cover the palette tightly with plastic wrap or close it in an airtight palette box. For several days to a few weeks, put the sealed palette in the freezer, where oxidation slows dramatically. Oil paint dries by reacting with oxygen, not by evaporating, so anything that blocks air and lowers temperature buys you time.
Squeezing out a fresh palette every session wastes a surprising amount of paint, especially with expensive pigments like cadmiums and cobalts. The good news is that oil paint is one of the easiest mediums to save, because it does not dry the way acrylic or watercolor does. Once you understand how to store oil paint on a palette, leftover piles become a resource rather than waste.
This guide covers why oil paint stays wet, five storage methods ranked by how long they work, which pigments dry fastest, and how to care for the palette itself, particularly wooden ones. If you are still choosing a palette, our guide to the best wooden palettes for oil painting covers sizes, finishes and weight.
Why Oil Paint Can Be Stored at All
Oil paint is pigment suspended in a drying oil, usually linseed, safflower or poppy. These oils do not evaporate. They harden through oxidation: oxygen molecules link the oil molecules into a solid film. This process is slow, which is why a thin layer of oil paint is often touch-dry in a few days and a thick one can stay soft underneath for weeks.
Two factors control the speed:
- Oxygen exposure. Less air contact means slower drying. A pile of paint skins over on the surface first while the inside stays soft.
- Temperature. Chemical reactions slow down as temperature drops. Cold paint oxidizes far more slowly than warm paint.
Light and humidity play smaller roles. Every storage method below works by limiting air, lowering temperature, or both.
What Is a Palette, and Does the Type Matter?
In painting, a palette has two meanings. It is the physical surface you mix paint on, and it is the set of colors you choose for a painting (the sense used in phrases like “how to use a color palette”). For storage, we mean the physical surface.
Palette material changes how storage works:
| Palette type | Storage strengths | Watch out for |
|---|---|---|
| Wooden (sealed) | Traditional, comfortable to hold; sealed wood does not absorb oil | Unsealed wood pulls oil from paint and can dry it faster; heavy for the freezer |
| Glass | Non-porous, scrapes perfectly clean, can sit flat in a freezer | Breakable; cold glass can crack with sudden temperature change |
| Plastic / acrylic | Light, inexpensive, fits palette boxes | Can stain; scratches hold old paint |
| Disposable paper | Easy to transfer to a freezer bag | Paper can absorb some oil; tears when scraped |
How to Store Oil Paint on a Palette: 5 Methods
Method 1: Leave it in the open (same day or overnight)
For many colors, a well-mixed pile left on the palette overnight will still be usable in the morning, especially in a cool room. This is fine for short breaks with slow-drying colors. It is not reliable for fast driers or for multi-day gaps.
Typical life: 12–48 hours, depending on pigment, room temperature and pile size.
Method 2: Plastic wrap or a sealed cover (1–3 days)
- Push your paint piles closer together toward the center of the palette.
- Lay plastic wrap directly on the palette so it touches the top of the piles or sits just above them. Pressing it gently onto the paint removes trapped air.
- Seal the edges by pressing the wrap against the palette or wrapping it around the back.
Wrap that rests directly on the paint lifts some off when removed, so use it for mixed colors you can afford to lose a little of.
Typical life: 1–3 days at room temperature.
Method 3: Airtight palette box (several days)
Palette boxes or “palette seals” are lidded plastic containers sized to hold a palette. Some have a gasket around the lid. Close the box and it creates a small, still air pocket that limits fresh oxygen reaching the paint.
A palette box is the most convenient everyday method: slide the palette in, close it, done. Some painters add a cotton ball with a few drops of clove oil inside the box (not on the paint). Clove oil is often reported to slow oxidation, but it can also affect drying of the paint film if it gets into the paint itself, so keep it separate and use very little.
Typical life: 3–7 days, longer in a cool room.
Method 4: Freezer (one to several weeks)
This is the method many working oil painters rely on.
- Cover the palette tightly with plastic wrap or seal it in a palette box. A large zip-top freezer bag works for paper or small palettes.
- Place it flat in the freezer. A dedicated drawer or shelf away from food is best.
- When you want to paint, take it out 10–20 minutes ahead and leave the cover on while it warms, so condensation forms on the cover rather than in your paint.
- Stir each pile with a palette knife before using.
Oil paint does not freeze solid in a household freezer in a way that damages it. It stiffens and becomes buttery again as it warms. The cold slows oxidation so much that many painters report keeping a palette workable for weeks. Results vary with pigment and how airtight the seal is.
Typical life: 1–4 weeks, sometimes longer.
Notes: Never put solvent or solvent-soaked items in a food freezer. Keep paint well sealed and away from food, since some pigments are toxic. If you can, use a separate small freezer for art supplies.
Method 5: Water submersion (a few days, specialist trick)
Some painters submerge a glass or plastic palette in a tray of water, or lay piles of paint under water, because water blocks oxygen. Oil and water do not mix, so the paint is not harmed in principle. In practice, water can get trapped in the paint when you remix it, which may cause beading or poor adhesion. If you try this, blot the paint thoroughly and work it with a knife on a dry surface before use. It is better suited to glass palettes than wood, which water can warp.
Methods compared
| Method | Typical working life | Effort | Best for |
|---|---|---|---|
| Open air | 12–48 hours | None | Overnight, slow colors |
| Plastic wrap | 1–3 days | Low | Weekend breaks |
| Palette box | 3–7 days | Low | Regular daily or weekly painters |
| Freezer | 1–4+ weeks | Medium | Long gaps, expensive pigments |
| Under water | A few days | Medium | Glass palettes; experimental |
Which Oil Colors Dry Fastest on the Palette?
Pigment chemistry affects drying speed. Some pigments act as natural driers; others slow the oil down.
- Fast driers: umbers (raw and burnt), Prussian blue, cobalt colors, lead white (flake white), and many earth colors containing manganese or iron. Raw umber can skin over in a day.
- Medium: ultramarine, burnt sienna, yellow ochre, many modern synthetic organics.
- Slow driers: cadmiums, ivory black, alizarin crimson, titanium white in safflower oil, and colors ground in poppy or safflower oil.
Practical takeaway: when storing a palette, squeeze out fast driers in smaller amounts and check them first. Mixed colors that include umber or a cobalt will dry faster than the pure slow color on its own.
How to Lay Out a Palette So It Stores Well
- Use a consistent order. Place colors around the edge in the same order every time. You will instantly see which pile needs replacing.
- Keep piles tall and compact. A tall pile has less surface area per volume than a smeared one, so it skins more slowly.
- Leave mixing space in the center. Scrape this area clean at the end of each session and keep only useful mixtures.
- Save key mixtures. Pile up the important ones, such as skin tones, sky colors and grays, with a knife. Throw away mud.
- Scrape thin smears. Thin films dry first and turn into crusty bits that contaminate fresh paint.
Reviving Paint That Has Started to Skin Over
- Thin skin on top: lift it off with the tip of a palette knife and use the soft paint underneath.
- Stiff but not dry: work it with a knife; add a drop of the same oil the paint is ground in (usually linseed) if needed. Do not add solvent to stored piles; it speeds drying and weakens the paint.
- Rubbery throughout: discard it. Partially cured paint will not bond well and can leave lumps in the painting.
Caring for a Wooden Palette Between Sessions
Wooden palettes are the traditional choice for oil painters, and the way you store paint on them affects how long they last.
Seal it before first use
Unsealed wood soaks up oil from your paint, pulling it out of the piles and changing their consistency. Most painters rub a thin coat of linseed oil into a new wooden palette, wipe off the excess, let it cure for several days to a week, then repeat two or three times. The cured oil forms a smooth, non-absorbent surface.
Clean the mixing area, leave the edges
At the end of a session, scrape the center with a palette knife, then wipe it with a rag and a little oil or solvent. Many painters deliberately let a thin layer of paint residue build up over time; this “seasoning” darkens the palette to a neutral mid-tone that makes judging color easier.
Keep it flat and away from heat
Store wooden palettes flat or hung, away from radiators and direct sun, to prevent warping. If a wooden palette goes in the freezer, let it come back to room temperature slowly with its cover on.
What to do with an old wooden palette
When a wooden palette is too thick with dried paint, you can sand it back to bare wood and re-oil it. Retired palettes are often kept as studio decor or reused as a sturdy surface for knife work.
Wooden palettes vs wooden pallets
The spellings trip people up. A palette is the painter’s mixing board. A pallet is the slatted wooden platform used for shipping goods. Searches like “what to do with wooden pallets” or “how to use wooden pallets in the garden” are about the shipping kind, used for DIY furniture, planters and compost bins. That has nothing to do with paint storage, but if you ever see “wooden pallet” on an art supply listing, it is almost certainly a misspelling of palette.
Common Mistakes When Storing Oil Paint
- Loose covers. A sheet of plastic draped over the palette lets air circulate. Seal it.
- Leaving the palette in a warm, sunny spot. Heat and light speed oxidation.
- Adding medium to the stored piles. Alkyd mediums and driers will make stored paint set faster. Add medium only to the portion you are about to use.
- Opening a frozen palette immediately. Condensation lands on cold paint. Let it warm with the lid closed.
- Storing near food. Pigments such as cadmium and cobalt are toxic. Seal everything and separate it from food.
FAQs
How long can oil paint stay on a palette?
Uncovered, most colors stay usable for one to two days. Sealed in a palette box, about three to seven days. Sealed in a freezer, many painters keep paint workable for several weeks.
Can you put oil paint in the freezer?
Yes. Freezing does not ruin oil paint; it slows oxidation. Seal the palette well, keep it away from food, and let it warm with the cover on before painting.
Does clove oil keep oil paint wet?
Clove oil is widely used to slow drying, typically placed on a cotton ball inside a closed palette box rather than mixed into paint. Mixing it directly into paint may affect how the film dries, so use it sparingly.
What is the best palette for storing oil paint?
Any non-porous palette that fits inside a sealable box or freezer works. Glass and sealed wood are popular. Unsealed wood absorbs oil and is the least suitable until it has been oiled and cured.
Why is my oil paint drying on the palette so fast?
Fast-drying pigments like umbers and cobalts, thin smears, warm rooms, alkyd mediums and unsealed wooden palettes all speed drying. Keep piles compact and cover them between sessions.
What is the meaning of palette in painting?
A palette is both the surface used to hold and mix paints and the range of colors an artist chooses for a work.
Final Thoughts
Storing oil paint well comes down to two habits: seal the palette and keep it cool. A palette box handles most weekly painting, and the freezer handles longer breaks. Pair either with a well-sealed, easy-to-clean surface and you will waste far less paint. If your current palette absorbs oil or will not fit a palette box, compare options in our guide to wooden oil painting palettes worth buying.
