Human Involvement as a Variable in Handmade Watercolor Pigment Behavior

In the formation, solid structure development, and long-term storage of watercolor pigments, materials do not transform automatically, and pigment behavior serves as a central variable running through the entire process. From the initial encounter with dry pigment powders, the inherent particle structure, density, water compatibility, odor, and surface adhesion of different pigments determine how they transition into subsequent stages. When transferring powders into containers, physical phenomena naturally emerge where lighter pigment particles float into the air while heavier pigment particles settle at the bottom, directly establishing the initial dispersion state of the material.

When pigment powders and binder liquids mix into the liquid stage, different pigments exhibit distinct behavioral traits, ranging from smooth blending and clumping to dry powder residue or bubble accumulation. During grinding and stirring, pigments respond dynamically through variations in particle feel, clumping resistance, viscosity, and surface friction, leaving visual evidence of remaining dry powder, surface foam, or paint clinging to surfaces. Grinding is not a uniform phase; whether pigments undergo prolonged friction or maintain coarse particle arrangements depends entirely on their specific material traits. Meanwhile, airborne dusting from loose pigment particles and intense surface staining represent concrete material interactions inherent to pigment behavior.

When filling pigment into pans in layers, varying drying speeds among different pigments directly dictate how much fresh liquid softens the semi-dried layer beneath and shapes the internal solid structure. Structural irregularities—such as rapid surface drying, internal cavities, detachment from pan walls, severe shrinkage, trapped bubbles, or liquid overflow—unfold as direct physical expressions of pigment behavior as the material settles into its solidifying direction.

Once completely dry and solidified, watercolor pigments reach a stable state defined by recorded shrinkage cracks, bubble marks, internal cavities, surface textures, and wall detachment. During static liquid storage, pigment particles demonstrate ongoing behaviors such as settling, separation, clumping, rising bubbles, wall adhesion, gas formation, or mold. Furthermore, high humidity causes re-softening while light exposure triggers secondary cracking after drying, continuously shaping the final state of the pigment during long-term environmental exposure.

Beyond the primary mass of the paint, pigment residue left on mulling slabs, tools, and containers continues to show distinct surface adhesion and staining characteristics. Because uncleaned residue interact with and alter subsequent material displays, ensuring thorough removal preserves the independent behavior of each pigment. Over the years, long-term observations and records of watercolor pigment behavior during material evolution have been compiled, parts of which have been archived as videos in pigment behavior records, and the resulting physical pigment manifestations are organized and presented as art materials on VHaquarell.