Role of Water as a Base Variable Across the Lifespan of Handmade Watercolor Systems: A Long-Term Observation Record

Throughout the complete lifecycle of handmade watercolors, water serves not merely as a diluting medium, but as an ongoing environmental and material variable present from initial mixing and natural drying to solid storage, painting reactivation, and tool maintenance. From the initial binder formation to the final application on paper, fluctuations in moisture content continuously influence both the shape stability and visual presentation of the paint.

1. The Role of Water in Making and Natural Drying

During the early stages of paint preparation, water directly participates in establishing the binder system. Its quality and volume play a decisive role in the structural formation of the paint.

• Impact of water quality and base volume: Water used in preparation must remain clean to avoid introducing suspended particles or foreign substances into the formula. During the mixing phase, managing water volume directly dictates the flow characteristics of the binder and its bonding efficiency with pigment particles.
• High sensitivity of the honey watercolor system to moisture: The honey watercolor system (including standard watercolors and fluorescent watercolors) is extremely sensitive to moisture levels. The binder requires a specific water content to maintain a stable state for carrying pigments. Excess water in the system noticeably lengthens the natural drying cycle, increases the risk of uneven drying between the surface and interior, and delays the time needed to reach a stable hardened state.
• Water behavior in metallic and chameleon systems: Due to larger pigment particles, metallic and chameleon watercolor systems dry faster overall and display higher tolerance to fluctuations in water volume. In these systems, water primarily functions to balance gum arabic concentrations to ensure proper re-solubility after the paint hardens.
• Cleaning making tools: Water also serves as a key medium for cleaning preparation tools. During production and when switching colors, containers for mixing powders and binders, stirring tools, mulling tools, and storage containers must be thoroughly washed with water to prevent cross-contamination from pigment residue left over from previous steps.

2. Water Interaction During Hardening and Reactivation

Following natural drying, moisture gradually leaves the system. During use, reintroducing water becomes the necessary trigger to reactivate the solid paint.

• Moisture release during drying and reintroduction: The hardening process represents the natural release of moisture from the paint system. During painting, water re-enters the system, prompting solid paint to shift from a resting solid state back into a workable liquid state.
• Reactivation limits from insufficient water: If too little water is picked up during reactivation, the solid paint cannot fully dissolve. This leads to difficult lifting, a dry and rough texture with noticeable graininess on application, and reduced flow on paper.
• Visual changes from excess water: Adding too much water during mixing dilutes the pigment concentration per area. Colors on paper may experience a drop in brightness and saturation, appearing lighter or displaying a muted greyish visual impression.

3. Water Control in Painting Application and Brush Care

In actual painting practice and post-painting cleanup, water continues to act as an active variable shaping material behavior and maintenance.

• Brush water content and painting performance: Moisture held within brush bristles directly alters the material ratio between the palette and the paper. Different painting techniques require different moisture distributions, directly affecting edge diffusion and paint layer thickness on paper.
• Cleaning paintbrushes: During brush washing, an adequate supply of clean water ensures that pigment and binder residues are removed from the root of the bristles. This prevents unwanted color contamination when changing shades and preserves the purity of subsequent paint applications.

4. Summary and Observation Boundaries

The role of water runs through an interconnected chain: water selection → binder preparation → pigment bonding → making tool cleaning → natural drying → solid storage → reactivation with water → paper presentation → brush cleaning.

Different color systems respond differently to moisture: honey watercolor systems are highly sensitive to excess water due to their slow drying nature, while metallic and chameleon systems rely on water primarily to maintain suitable gum arabic concentration ranges. In painting, the amount of water introduced directly determines solubility levels and the visual structure of the paint layer. Water constantly acts alongside pigment properties, binder formulas, and ambient temperature and humidity to determine the final material behavior of handmade watercolors.

Video footage documenting select steps of the handmade watercolor making process and pigment behavior is archived at VHacademy (an independent project researching material behavior, accessible via paid subscription).