Granulation and flocculation—what’s the difference? Paint in Hiding has been super curious about this for a while.
Every time they paint, they notice how pigments behave differently, and that curiosity keeps leading them deeper into the world of watercolor textures.
Recently, Paint in Hiding discovered something really cool—and surprisingly overlooked. In this post, they’ll explain both watercolor effects in clear, simple detail.
If pigment texture fascinates you too, let’s explore this together!
Contents
What Is Granulation in Watercolor Painting?
Granulation is something most watercolor artists can recognize instantly. But what actually causes it?
Granulation Meaning and How It Affects Artwork
According to an excellent explanation from Jackson’s Art blog, granulation occurs when pigment particles settle unevenly on the paper surface.
This uneven distribution creates the beautiful, textured effect often associated with granulating paints. It adds character to washes, enhances mood, and brings subtle variation to areas that might otherwise appear flat.
Examples of Granulating Watercolors
Cobalt turquoise is a perfect example. When tested, the pigment spreads relatively evenly but still leaves behind visible grain. That soft, broken texture is classic granulation.
The same is true for Potter’s Pink. Even though the pigment disperses across the paper, the granular particles settle in a way that produces a distinctly rough, textured finish. This characteristic granulation adds charm and depth to the painting.
What Is Flocculation in Watercolor and Why It Matters?
Now for something far rarer—but even more intriguing: flocculation.
Flocculation in Watercolor: Definition and Unique Effects
While granulation is caused by uneven settling, flocculation works differently. Flocculation occurs when pigment particles attract one another and cluster together into tiny groups.
These concentrated clusters form striking visual patterns on the paper—patterns that look wonderfully organic and almost alive.
Why Flocculating Watercolors Are Rare and Fascinating
Flocculation depends heavily on the chemical makeup of the pigment and the medium surrounding it.
Only a few watercolor pigments naturally exhibit this behavior, making flocculated textures unexpected and exciting whenever they appear.
Examples of Flocculating Watercolor Pigments
Some watercolor pigments display flocculation exceptionally well, and the following examples highlight this rare and fascinating behavior.
Top Flocculating Colors from Daniel Smith
hese three Daniel Smith colors show flocculation with remarkable clarity:
- Transparent Yellow Oxide: This pigment forms small clusters that visibly separate from the wash. Unlike typical granulation, the particles gather together instead of spreading out evenly.
- Transparent Brown Oxide: This color behaves similarly. Instead of settling into a uniform grain, the pigment forms tiny clumps throughout the wash.
- Transparent Red Oxide: Among the three, this pigment demonstrates the strongest flocculation. Distinct clusters form as the wash dries, creating bold, organic textures.
More Flocculating Paints: Winsor & Newton Mauve (PV16)
Another standout is Winsor & Newton Mauve, made with PV16 manganese violet. This pigment flocculates dramatically, producing clear, intentional-looking clusters across the paper surface.
These examples show how flocculation differs visually from standard granulation. Instead of an even grain, the pigment groups into natural, irregular patterns—beautiful in their unpredictability.
Flocculation vs Granulation in Watercolor: What’s the Difference?
Although the two effects are often confused, they originate from different pigment behaviors.
How to Tell Granulation and Flocculation Apart
Granulation means the pigment spreads and settles unevenly, but still fairly evenly across the page. Flocculation, on the other hand, means the pigments attract each other and form visible groups.
In short:
- Granulation = scattered, grainy texture
- Flocculation = clustered pigment patterns
Both are natural pigment behaviors, but they create different effects.
Flocculation Is a Type of Granulation: An Easy Analogy
Here’s how the artist makes sense of it: flocculation is a kind of granulation, but not all granulation is flocculation.
It’s just like the shape analogy—all squares are rectangles, but not all rectangles are squares. Flocculation fits inside the bigger category of granulation. Once this comparison is made, the concept finally clicks!
Exploring the Artistic Use of Flocculation in Watercolor
Now that examples have been shown and the differences explained, it’s time to consider what this means in practice.
Can Flocculating Paints Enhance Your Watercolor Art?
To be fully transparent, it remains unclear how this phenomenon applies directly to painting techniques. The exploration is still ongoing, but the behavior of these pigments is undeniably intriguing.
There is clear potential for using flocculation to create unique textures and added depth in a watercolor piece. It is a characteristic worth experimenting with, and it may eventually inspire entirely new creative possibilities.
Final Thoughts
Understanding how watercolor pigments behave—whether they granulate or flocculate—can enrich artwork by introducing depth, texture, and natural visual interest. Each effect brings something distinct to a painting.
Why not explore these pigments in the next piece and observe how they settle on the page? New ways to enhance watercolor art through texture alone might reveal themselves in the process.