How to Use Watercolor Tubes
Watercolor tubes give you fresh, highly pigmented paint that can be used straight from the tube or dried into a reusable palette.
Understanding how to use watercolor tubes helps you control color strength, reduce waste, and work more efficiently whether you paint at home, in the studio, or outdoors.
This guide explains how tube watercolor differs from pans, how to set up a palette, how to mix and store paint, and how to avoid common mistakes that affect color quality and paint life.
What watercolor tubes are and why artists use them
Watercolor tubes contain wet watercolor paint in a sealed metal or plastic tube.
The paint usually includes pigment, binder such as gum arabic, and additives that help with flow, drying, and preservation.
Compared with dry pans, tubes often deliver stronger color, faster reactivation, and more flexibility for filling custom palettes.
Artists choose tubes for several practical reasons:
- Higher pigment load: many tube paints produce more intense washes.
- Easy palette filling: you can squeeze paint into wells and let it dry.
- Better for large areas: mixing enough paint for skies, backgrounds, or repeated layers is simpler.
- Custom color control: you can create your own organized mixing system.
How to use watercolor tubes step by step
1. Choose the right palette
Use a palette with wells, mixing areas, and a lid if possible.
Plastic, enamel, ceramic, and metal palettes all work, but a covered palette is especially useful because it keeps tube paint clean and lets you store dried color between sessions.
2. Squeeze paint into the wells
Open the tube and squeeze a small amount of paint into each well.
Start with less than you think you need; watercolor tubes are concentrated, and a little often goes a long way.
If you use a limited palette, dedicate one well per color so your mixes stay predictable.
3. Let the paint dry if you want pan-style use
Fresh tube paint can be used immediately, but many artists prefer to let it dry in the palette.
Drying usually takes several hours to a couple of days depending on humidity, airflow, and paint thickness.
Once dry, the paint can be reactivated with water just like a pan color.
4. Activate the paint with water
To paint, dampen your brush and touch it to the dried or fresh tube paint.
The water dissolves the binder and releases pigment onto the brush.
Add water gradually to control transparency, and mix on the palette rather than directly on the paper when you need consistency.
5. Mix colors on the palette
Watercolor tubes are ideal for mixing custom hues.
Place small amounts of two or more colors in a mixing area and blend them with a clean brush.
Because tube colors can be intense, start with a tiny amount of the darker or more staining pigment and build up carefully.
Best ways to prepare a tube watercolor palette
A well-organized palette makes tube watercolor easier to manage.
Many painters set up a palette using a limited number of pigments, such as a warm and cool version of primaries plus a neutral earth tone.
This creates reliable mixing without overwhelming the palette with too many colors.
Useful palette setup tips include:
- Label wells if your palette is shared or portable.
- Keep color families together, such as blues, reds, and yellows.
- Reserve a mixing area large enough for full washes.
- Leave empty wells for experimental blends.
- Allow each squeezed color to dry fully before closing the lid.
If your paint remains sticky after drying, you may have squeezed it too thickly.
Spread it more thinly or leave the palette open longer to allow better evaporation.
How much water should you use?
The amount of water determines whether your wash looks transparent, medium-toned, or saturated.
One of the main skills in learning how to use watercolor tubes is judging the paint-to-water ratio.
- More water: lighter washes, soft gradients, and glazing.
- Less water: stronger color, sharper edges, and higher saturation.
- Very little water: concentrated marks for accents and detail.
Test the mix on scrap paper before painting the final artwork.
Paper type matters too; cotton watercolor paper usually gives better blending and more even washes than lower-quality paper.
Can you use watercolor tubes straight from the tube?
Yes.
Tube paint can be used directly from the tube if you need bold color or want to paint without waiting for a palette to dry.
This is useful for thick applications, color studies, or quick setup in the studio.
However, using tube paint straight from the tube can be wasteful if you squeeze out too much.
It also can create overly strong marks if you do not dilute it.
In most cases, squeezing into a palette first gives you more control and better color management.
How to store watercolor tubes and dried paint
Store unopened watercolor tubes in a cool, dry place away from direct sunlight.
After use, wipe the tube opening before closing the cap to prevent dried paint from sealing it shut.
If paint dries on the threads, the cap may stick or crack.
For palettes filled from tubes, keep the lid closed when not in use to reduce dust.
If the paint rehydrates unevenly after long storage, add a few drops of water and let it sit for a minute before mixing.
This is normal and does not usually affect performance.
Common mistakes when using watercolor tubes
Even experienced painters run into avoidable issues when working with tube watercolor.
These mistakes can make color muddy, reduce control, or shorten the life of your paint.
- Using too much paint: tube watercolor is concentrated, so start small.
- Skipping test swatches: colors may dry lighter than they look when wet.
- Mixing too many pigments: overmixing often creates dull or muddy results.
- Closing the palette too soon: trapped moisture can cause sticky paint or mildew in humid conditions.
- Not cleaning the tube rim: dried paint can make the cap hard to remove later.
How tube watercolor compares with pans
Both tubes and pans are made for watercolor painting, but they serve slightly different workflows.
Pans are compact and convenient for travel, while tubes are better for refilling, custom palettes, and large-volume mixing.
Many artists use both: tube colors in a studio palette and smaller pan kits for sketching or plein air work.
Choose tubes if you want:
- fresh paint with strong pigment load
- custom palette organization
- easy refilling of dried pans
- more flexibility for large washes
Choose pans if you want:
- a compact travel setup
- less prep time
- minimal cleanup
- a ready-to-go portable kit
How to refill pans from tubes
Refilling pans is one of the most useful reasons to buy tube watercolor.
To refill, squeeze a small amount of paint into an empty pan, spread it evenly, and let it dry.
If the paint shrinks as it dries, add a second thin layer rather than one thick layer.
For best results, refill pans in stages.
Thin layers dry more evenly and are less likely to crack.
Once the pan is full and fully dry, it can be reactivated with water for regular use.
Tips for better results with watercolor tubes
Small workflow improvements can make tube watercolor much easier to control and more enjoyable to use.
- Use a spray bottle to rewet dried palette colors quickly.
- Keep two water containers: one for rinsing, one for clean water.
- Mix on a white surface so you can judge color accurately.
- Choose professional-grade pigments when lightfastness matters.
- Record your favorite color mixes for repeatable results.
As you practice, pay attention to how each pigment behaves.
Some colors stain heavily, some granulate, and some lift easily after drying.
Those differences matter more than brand names when you want predictable watercolor results.
What to look for when buying watercolor tubes
If you are choosing new tubes, read the pigment information on the label rather than relying only on the color name.
A tube labeled as a single-pigment paint often mixes more cleanly than a convenience blend made from multiple pigments.
Helpful label details include:
- Pigment code: identifies the actual pigment used.
- Lightfastness rating: indicates resistance to fading.
- Transparency: helps predict layering behavior.
- Series number: often reflects pigment cost and pricing.
For artists building a serious palette, quality pigment information matters more than packaging or branding.
It helps you choose colors that mix well and hold up over time.