Why Material Development Benefits from Fewer Variables
Discussions about handmade watercolors often focus on what has been added to a formulation. Stabilizers, preservatives, wetting agents and other functional additives are commonly used to improve specific properties or enhance performance. While these materials can be effective for certain purposes, they also raise another question. If more and more components are introduced into a material system, how much of the pigment's original behavior can still be observed?
Material development begins by understanding materials rather than changing them.
Every pigment has its own physical characteristics, including particle size, density, transparency, water affinity, surface structure and long-term stability. These properties determine how a pigment interacts with a binder system and how the material develops during mixing, drying, storage and later use. As additional functional materials are introduced, the overall system changes, making it increasingly difficult to distinguish which characteristics belong to the pigment itself and which result from other components.
A stabilizer, for example, may improve the stability of a material system. At the same time, it becomes more difficult to observe how stable the pigment would be on its own. The same principle applies to many other additives. Wetting agents can alter flow behavior, certain ingredients influence drying, and others modify handling characteristics. Every additional material introduces another variable that affects the final result.
For material development, this creates an important challenge. The more variables a material system contains, the more difficult it becomes to understand the behavior of the material itself.
Long-term observation depends on the ability to connect changes with their underlying causes. A simpler material system makes these relationships easier to identify. When unnecessary variables are reduced, observations become more consistent, documentation becomes more meaningful and long-term comparisons become more reliable.
The same principle also applies to preservation. Protecting a material is essential, but there are different ways to achieve this. Plant-based clove essential oil can provide a level of preservation, while cool storage helps slow unwanted changes over time. The objective is not to change the nature of the material, but to create conditions that allow its original behavior to remain observable throughout long-term development.
This does not suggest that functional additives are inherently unsuitable. Different products may require different formulations depending on their intended purpose. However, when the goal is to understand a material, it becomes important to separate the behavior of the pigment from the effects introduced by additional ingredients. Only then can long-term observations reflect the material itself rather than the combined influence of multiple additives.
Over time, material development shows that the number of ingredients is less important than understanding the role of each one. Reducing variables is not about creating the simplest possible formulation. It is about making material behavior easier to observe, easier to document and easier to understand.
From this perspective, a handmade watercolor is more than a painting material. It is a material system that continues to develop over time. Reducing unnecessary variables is therefore not simply a formulation choice but a development principle. The more closely a material is allowed to follow its own characteristics, the more reliable long-term observation becomes and the stronger the foundation for future material knowledge.
