Tool and Material State in Watercolor Production

In handcrafted watercolor paint production, the grinding tool is not a universal solution that resolves all combination issues between pigments and binders. Different tools possess distinct operating mechanisms. Their suitability depends on the specific physical state of the material and the corresponding observation needs.

1. Initial Pigment State and Operating Mechanisms of Tools

Pigments exhibit different physical forms when entering the production process. Accordingly, the observed material phenomena and tool operating mechanisms vary:

Particle Size Reduction (Clumpy and Aggregated Pigments)

When a pigment exists in the form of blocks, large grains, or solid aggregates, the material is characterized by a larger particle structure. A glass muller, used on a frosted glass slab, produces a refining effect on these solid structures through targeted, localized friction. In this state, the glass muller exhibits a clear utility in reducing particle size.

Combination Behavior of Fine Powder and Binder System (Powdered Pigments)

When pigment particles are already very fine, or when the pigment enters the process as a fine powder, the phenomenon shifts to how fine particles combine with the binder system:

• Material Observation: Even when particle size has been significantly reduced, certain pigments with limited binding affinity still leave fine, powdered residues visible on the surface or in localized areas of the liquid system.
• Tool Limitations: The contact area of a glass muller is relatively small. For very fine powder, simply repeating the mulling motion does not directly alter its combination state with the binder. Furthermore, detecting remaining fine powder across a small contact surface is visually more difficult.

2. Influence of Tool Contact Area on Material Spreading and Observation Conditions

Variations in the contact area of a tool directly alter how the material distributes across the working surface, how it moves, and its visual visibility:

Small Contact Area and Localized Distribution

Tools with a small contact area, such as the glass muller, concentrate force onto localized, solid particle structures.

Large Contact Area and Dynamic Observation Conditions

When processing certain pigments, tools featuring a wide metal surface and a longer handle exhibit a different operating mechanism:

• Material Spreading Form: A larger contact area allows the material to be spread out more fully. As a result, fine powdered components become visually more apparent in the expanded state.
• Observation Conditions: As the material is spread and moved, the presence of fine powder, the continuity of the mass, and any incompletely bound areas can be observed from a much clearer perspective.

3. Continuity of Grinding Variables and Differing Phenomena

No Standardization of Grinding Duration or Intensity

There is no fixed, universally applicable grinding duration or standardized procedure. Processing intensity represents a continuous spectrum of material states:

• States requiring no distinct grinding, achieving combination through thorough mixing alone;
• States requiring a certain degree or extended period of grinding;
• States requiring a standing period after grinding to observe particle redistribution or settling;
• States exhibiting separation after long-term standing, returning to a liquid state upon re-mixing.

Material Differences Across Paint Ranges

• Standard Watercolor and Honey Watercolor Ranges: Certain pigments exhibit clear grinding and standing observation phenomena. However, individual variations exist among colors within the same range.
• Fluorescent Range: Dispersion states vary significantly among individual pigments within this range, forming no single uniform system.
• Metallic and Chameleon Ranges: These pigments usually feature larger particle structures and good physical compatibility with water. Grinding is not a primary factor. Their main phenomena manifest as phase separation after long-term standing and the restoration of uniformity through re-mixing.

4. Alignment Between Tool and Material State & Quality Assessment

Alignment Between Tool and Material Issue

A single tool is not an all-purpose solution. Whether a tool is "professional" is a separate question from whether it matches the current material issue. Aligning tools with specific material states creates clearer observation conditions.

Separation of Grinding from Quality Assessment

Grinding duration or the use of a specific tool does not constitute a standalone criterion for evaluating paint quality. The appropriate processing state depends on the inherent physical properties of the pigment.

Logical Sequence of Tool Selection

Tool selection follows a continuous logical sequence:

Pigment Property → Material State → Material Issue Arising → Observation Perspective → Tool Alignment

5. Summary and Note on the Visual Archive

In handcrafted watercolor production, there is no universal grinding method for all combination issues. The glass muller primarily serves to refine clumpy pigment structures, while wide scraping tools provide different contact areas and observation conditions for combining fine powder with binder systems. The suitability of a tool always reveals itself within the context of the specific pigment form.

Videos and visual records covering parts of the production process and pigment behavior are preserved within the archive at VHacademy (an independent material behavior research project with paid access).