Quick answer: Here is how to make a stay wet palette at home: take a shallow plastic container with a lid, line the bottom with two to four folded paper towels or a thin sponge, and soak them with water before pouring off the excess. Lay a sheet of baking parchment on top, smooth out bubbles and press it flat. Put your acrylic or gouache paint on the parchment and close the lid between sessions. Moisture wicks up through the parchment and keeps paint workable for hours or days.
Acrylic paint has one big weakness on an open palette: it dries, sometimes in minutes. A stay-wet palette solves that by feeding a slow, steady supply of moisture to the paint from underneath. Commercial versions work well, but the principle is simple enough that a sandwich box and a roll of parchment can do the same job.
Here is exactly how to make a stay-wet palette at home, which materials work best, how wet the layers should be, how to stop mold and how to fix the usual problems. Once yours is built, our guide on using a stay-wet palette correctly covers day-to-day technique.
How a Homemade Stay-Wet Palette Works
The palette has three layers: a water reservoir (wet towels or sponge), a porous top sheet (parchment or membrane paper) and a lid. Water moves up through the porous sheet into the base of each paint pile, replacing what evaporates from the surface. The lid slows evaporation further when you are not painting. The result is paint that stays soft far longer than on a plastic or paper palette.
Should You Build One or Buy One?
Building your own makes sense if you want to try the stay-wet method cheaply, need an odd size, or paint small pieces such as miniatures where a tiny palette is enough. Buying one makes more sense if you want a reliable seal, a sponge and membrane cut to fit, and refill packs that match. Many painters start with a homemade version, decide they like working wet, and then upgrade. If you would rather skip straight to a ready-made option, our comparison of stay-wet palettes made for acrylics explains the main designs.
Materials You Need
| Item | Options | Notes |
|---|---|---|
| Container with lid | Food storage box, takeout container, plastic pencil box, flat tackle box | Shallow (around 1 inch deep) and airtight is best |
| Water reservoir | Paper towels, thin kitchen sponge, sponge cloth | Sponge holds more water; towels are cheap and easy to replace |
| Top sheet | Baking parchment, commercial stay-wet membrane paper | Must be porous; standard coated palette paper does not work |
| Water | Tap or distilled | Distilled may reduce mineral deposits |
| Scissors | Any | To trim towels and parchment to fit |
Choosing a container
Size depends on how you paint. For hobby miniatures and small works, a container around 6 x 8 inches is plenty. For canvases and larger acrylic paintings, look for something closer to 9 x 12 inches. A low, flat container is easier to mix in than a deep one, and a snap-tight lid keeps moisture in between sessions.
How to Make a Stay Wet Palette Step by Step
- Clean the container. Wash it with soap and water and dry it. Leftover food residue encourages mold.
- Cut the reservoir layer. Fold paper towels into two to four layers sized to cover the bottom of the container, or trim a thin sponge to fit.
- Soak the reservoir. Pour in enough water to saturate the towels or sponge completely.
- Drain the excess. Tilt the container and pour off standing water. The layer should be saturated but not swimming. If you press it, water should appear, but there should be no puddle around the edges.
- Prepare the parchment. Cut a sheet slightly smaller than the reservoir. Some painters soak parchment in warm water for 10 to 30 minutes first, which helps it lie flat and pass moisture more readily.
- Lay the parchment on top. Place it on the wet layer and smooth from the center outward with your fingers or a paper towel to push out air bubbles.
- Test it. Put a small dab of paint on the parchment. After a few minutes it should still feel soft and creamy.
- Add paint and close the lid when not using it.
Paper Towels vs Sponge: Which Reservoir Is Better?
| Reservoir | Pros | Cons |
|---|---|---|
| Paper towels | Cheap, flat, easy to replace often | Hold less water; may dry out sooner |
| Thin sponge | Holds more water; lasts longer between top-ups | Can trap mold; uneven thickness may cause bumps |
| Sponge plus paper towel on top | Water capacity of sponge, flat surface of towel | Slightly more setup |
For most painters, paper towels are the simplest start. If your palette dries out too quickly, switch to a sponge or combine the two.
Parchment vs Membrane Paper
Baking parchment is the most popular top sheet for homemade palettes. It is inexpensive, easy to find and lets enough moisture through for most paints. Commercial membrane paper sold with stay-wet palettes is designed specifically for this job; some painters find it keeps paint wetter or more consistent.
Not all parchment behaves the same, since coatings vary by brand. If paint dries too fast on one brand, or the sheet stays too dry, try another or soak it longer before use.
Avoid wax paper, freezer paper and coated palette paper as the top layer. Their coatings block water, which defeats the purpose.
How Wet Should the Palette Be?
Getting moisture right is the main skill.
- Too wet: paint becomes runny, spreads out and loses body. Colors may bleed into each other.
- Too dry: paint thickens and skins over like on a normal palette.
- Just right: paint keeps its tube consistency, or a little softer, for the whole session.
If paint is getting watery, blot the reservoir with a dry paper towel before laying the parchment back down. If paint is drying, add a little water at the edge of the reservoir with a dropper or spray, lifting a corner of the parchment.
Using Your Homemade Palette
- Squeeze paint in small piles along the edges, leaving space in the center for mixing.
- Mix with a soft palette knife or brush; parchment can tear under sharp, heavy pressure.
- Expect paint to soften slightly over time as it absorbs moisture.
- Close the lid during breaks, even short ones.
- For gouache, the same palette works, though gouache can become wetter more quickly. Use less water in the reservoir.
Using Mediums on a Homemade Wet Palette
You can mix acrylic mediums, such as matte or gloss medium, glazing medium or flow improver, into paint on the parchment. Keep in mind that the paint will keep absorbing a little moisture from below, so glazes mixed on a wet palette may become thinner over a long session. Mix small glaze batches as you need them rather than all at once. Heavy gels and texture pastes are better mixed on a separate hard surface, since pressing them with a knife can tear the parchment.
Storing Paint Between Sessions
When you stop for the day, close the lid firmly and keep the palette level so water does not pool at one end. A cool room or a shelf away from windows slows both drying and mold growth. Some painters place the closed palette in the refrigerator overnight; if you do, keep it away from food and in a sealed bag, and let it come back to room temperature before painting.
Before the next session, lift a corner of the parchment and check the reservoir. If it feels only slightly damp, add a little water; if it is soggy, blot it. Then check each paint pile and remove any that have formed a skin.
Preventing Mold
A warm, wet, enclosed space can grow mold, especially if paint stays in the palette for many days. To reduce the risk:
- Change the paper towels or rinse the sponge every few days to a week.
- Replace the parchment when it gets heavily stained or starts to break down.
- Wash the container with soap and hot water between refreshes.
- Use distilled water if your tap water leaves residue.
- Store the palette somewhere cool, out of direct sunlight.
- Open the lid and let it air out occasionally.
Some painters add a copper coin or a drop of a mild antimicrobial to the water. Evidence for these tricks is mostly anecdotal, and additives may affect paint, so regular cleaning remains the more reliable approach.
How Long Will Paint Stay Wet?
It varies with the paint brand, the room’s temperature and humidity, how often you open the lid and how wet the reservoir is. Many painters find acrylic stays usable for a full day or several days in a well-maintained homemade palette, and sometimes longer with the lid closed in a cool place. Fluid paints tend to get runnier over time; heavy-body paints hold up better.
Variations for Different Painters
Miniature and model painters
Use a small container and a thin sponge with parchment. Hobby acrylics are fluid, so keep the reservoir only moderately wet to stop paint from spreading.
Canvas painters
Choose a larger, flat container. Heavy-body acrylics work well, and a palette knife can be used gently for mixing.
Gouache painters
Gouache rewets easily, so it needs less moisture than acrylic. Use a single layer of paper towel, keep it just damp and check that colors are not turning soupy. Some gouache painters prefer to keep the reservoir drier and simply mist the paint now and then.
Outdoor painters
A container with a locking lid travels well. Pack it flat, and carry a small spray bottle to top up the reservoir.
Troubleshooting a Homemade Stay-Wet Palette
The parchment curls or will not lie flat
Soak it longer in warm water before placing it, and smooth it firmly onto the wet reservoir.
There are bubbles under the parchment
Air pockets block moisture from reaching paint. Smooth them out toward the edges with a paper towel or credit card.
Paint is drying anyway
The reservoir may be too dry, the parchment brand may be too water-resistant, or the lid is not sealing. Add water, try a different top sheet and check the lid.
Paint becomes too thin
The reservoir is too wet. Blot off excess water and use slightly less next time.
It smells musty
Mold is starting. Throw away towels and parchment, wash the container thoroughly and start fresh.
Homemade vs Store-Bought
| Factor | Homemade | Store-bought |
|---|---|---|
| Cost | Very low | Moderate, plus refill packs |
| Fit and seal | Depends on container | Designed for the purpose |
| Top sheet | Parchment, varies by brand | Matched membrane paper |
| Extras | None | Some include brush holders or deeper wells |
A homemade palette is a great way to see whether the stay-wet approach suits you. If it does, a purpose-built version can be more convenient; our comparison of the best stay-wet palettes for acrylics explains what the commercial designs add.
FAQs
How do you make a stay wet palette?
Line a lidded plastic container with wet paper towels or a sponge, pour off excess water, place baking parchment on top and smooth out bubbles. Put paint on the parchment and keep the lid closed when not painting.
Can you use parchment paper for a wet palette?
Yes. Baking parchment is the most common top sheet for homemade wet palettes because it lets moisture pass through. Brands vary, so try another if one dries too fast.
Can I use wax paper in a stay wet palette?
No. Wax paper blocks water, so paint on top will dry like it would on any other surface.
How often should you change the paper towels?
Every few days to a week, or sooner if you notice discoloration or a musty smell.
Does a stay wet palette work for oil paint?
No. Oil paint does not dry by evaporation and does not mix with water. Stay-wet palettes are designed for acrylic and gouache.
Why is my paint getting watery on a wet palette?
The reservoir is too wet. Pour off or blot excess water so the towels are damp but not dripping.
Final Thoughts
A homemade stay-wet palette takes about five minutes to build and can save a lot of acrylic paint. Keep the reservoir damp but not flooded, use a porous top sheet like parchment, and refresh everything regularly to prevent mold. If you want a sturdier, better-sealing version, see our picks for the top stay-wet palettes for acrylic painters.
