Watercolor is one of the oldest and most beloved painting mediums in the world. It’s also one of the most misunderstood. Many people think of watercolor as the medium of children’s art kits and Sunday afternoon hobby classes. In reality, watercolor is one of the most technically demanding and expressively beautiful mediums an artist can master.
As a professional watercolor artist, I’ve spent years learning its rhythms — and I’m still surprised by it every time I sit down to paint. This guide covers everything you’d want to know about watercolor painting, from the basics of how it works to why so many artists and collectors are drawn to it.
How Watercolor Works
At its simplest, watercolor paint is pigment suspended in a water-soluble binder, typically gum arabic. When you mix the paint with water and apply it to paper, the water carries the pigment particles into the paper’s fibers. As the water evaporates, the pigment is left behind, held in place by the dried binder.
What makes watercolor fundamentally different from other painting mediums is its transparency. Unlike acrylic or oil paint, which sit on top of the surface as opaque layers, watercolor pigment sinks into the paper and allows the white of the paper to show through. That’s where watercolor gets its characteristic luminosity — the light hits the white paper beneath the pigment and bounces back through the color, creating a glow that no other medium can replicate.
This transparency also means that watercolor is, by nature, a medium of addition rather than correction. Once pigment is on the paper, it’s very difficult to remove. Every brushstroke matters. This is why many painters consider watercolor the most technically challenging medium — there’s very little room for error, and the paintings that seem effortless are usually the ones that required the most skill.
A Brief History
Watercolor painting has roots stretching back to the cave paintings of the Paleolithic era, where early humans mixed mineral pigments with water to create images on stone. Through ancient Egypt, medieval manuscript illumination, and East Asian brush painting, water-based pigments have been a constant thread in the human story of art-making.
The medium truly came into its own in 18th- and 19th-century England, where painters discovered that watercolor was the ideal medium for capturing the atmospheric effects of landscape — the way light filters through clouds, the soft gradients of a misty valley, the sparkling reflection of sunlight on water. Artists from that era established watercolor as a serious fine art medium worthy of exhibition and collection.
In America, watercolor found its greatest champions in Winslow Homer and John Singer Sargent, both of whom used the medium to create works of breathtaking power and immediacy. Homer’s seascapes and Sargent’s Venetian scenes demonstrated that watercolor could hold its own against oil painting in terms of ambition, emotion, and artistic achievement. Today, watercolor continues to thrive as both a studio practice and a collectible medium.
Materials and Techniques
Paper is arguably the most important material in watercolor painting. Professional watercolor paper is made from 100% cotton fiber (also called “rag” paper), which absorbs water evenly and holds pigment beautifully. The two most common surfaces are cold press (slightly textured, the most popular choice) and hot press (smooth, for finer detail). Paper weight matters too — 140lb (300gsm) is standard, while 300lb (640gsm) is heavier and doesn’t need to be stretched before painting.
Paint quality ranges from student-grade to professional/artist-grade. Professional watercolors use higher concentrations of pure pigment with fewer fillers, resulting in richer, more vibrant, and more permanent colors. Brands like Daniel Smith, Winsor & Newton, and Schmincke are trusted by professionals worldwide.
Techniques in watercolor are built around the behavior of water. Wet-on-wet painting means applying wet paint to wet paper — this creates soft, diffused edges and unpredictable blooms of color. Wet-on-dry painting means applying wet paint to dry paper, which gives crisp, defined edges. Glazing involves layering thin, transparent washes of color one on top of another after each layer dries, gradually building depth and complexity. Lifting is the technique of removing pigment from the paper with a damp brush or sponge, creating highlights and soft edges.
Why Collectors Love Watercolor
Watercolor paintings have a quality that’s difficult to put into words but immediately recognizable when you see it. The luminosity — that inner glow — creates a feeling of light and air that other mediums struggle to achieve. A watercolor landscape doesn’t just show you a scene; it seems to breathe.
For collectors, watercolor offers several practical advantages as well. Watercolor paintings tend to be priced more accessibly than comparable oil paintings, making them an excellent entry point for new collectors. They’re lighter and easier to ship than canvases. And when properly framed behind UV-protective glass, they’re remarkably durable — many watercolors from the 18th and 19th centuries have survived in excellent condition.
The art market has also seen growing appreciation for watercolor in recent years. As collectors — particularly younger buyers — prioritize authenticity, handcraft, and connection with the artist, watercolor’s handmade quality and the visible evidence of the artist’s process resonate deeply.
Caring for Watercolor Paintings
Watercolor is more light-sensitive than oil or acrylic, which means proper display and care are important. The most important step is framing behind UV-protective glass or acrylic, which filters out the ultraviolet light that causes pigment to fade. Avoid hanging watercolors in direct sunlight, and keep them away from areas with high humidity or moisture.
With proper care, a watercolor painting will maintain its vibrancy for generations. I go into much more detail in my Complete Guide to Caring for Watercolor Paintings.
Explore Original Watercolor Paintings
If this guide has sparked your interest in watercolor, I’d love for you to explore my own work. I paint original watercolors inspired by the Maine coast, wildflowers, animals, food, and the natural world — each one created by hand in my Falmouth studio.
