About
Pigmenta Works is a company dedicated to the extraction, refinement, and transformation of natural earth pigments. Working primarily with iron-rich ochre recovered from Danish water treatment plants, the studio reclaims what is typically considered industrial waste and reintroduces it as a refined and contemporary material resource.
Rooted in processes that have been carried out for more than a thousand years, Pigmenta Works combines historical pigment-making techniques with controlled modern production. Through drying, crushing, washing, decantation, firing, and milling, raw sediment is transformed into stable mineral pigments in tones ranging from warm earth reds and deep browns to violet hues. Each batch reflects both its geological origin and the specific firing conditions applied.
The studio operates at the intersection of craft, material research, and circular resource thinking — positioning pigment not only as color, but as a cultural and geological material.
Thomas Woltmann (b. 1993, Denmark) is a designer and material researcher working with natural resources, local production systems, and material narratives. Educated at Design Academy Eindhoven and The Royal Danish Academy, his practice explores how regional materials — both tangible and intangible — can be recontextualized through contemporary design.
Through pigmenta works, Woltmann investigates ochre as both a historical pigment and a byproduct of modern infrastructure. By recovering and refining iron sediments from water treatment plants, he connects industrial processes with craft-based production, creating pigments that carry geological, ecological, and cultural significance.
His work seeks to strengthen the relationship between material, place, and production — revealing value where it is often overlooked.
Values
Pigmenta Works is founded on the belief that color is more than codes — it is a material with a story. Our pigments are derived directly from nature, shaped by geology, culture, and people, and refined with care and responsibility.
Each element gives the pigment its own narrative — expanding our experience of color beyond red, yellow, and brown to include places, histories, and the landscapes they come from.
place, process, and people.
Derived from Nature
Every pigment we produce comes from 100% natural resources. We work exclusively with natural materials, allowing their inherent character, variation, and depth to define the final color.
Consciously Extracted
As the only producer of natural earth pigments sourced from water systems, we operate in close relationship with the surrounding environment. Our production depends on the health of these ecosystems, and we are committed to working with sensitivity and awareness, minimizing impact while honoring the landscapes that make our work possible.
Full Transparency
We believe the true value of our colors lies in their origin and transformation. From the exact source of the raw material to the methods of processing and refinement, we maintain complete transparency. Each pigment carries a traceable story — of place, process, and people.
Chemically Free
No chemicals are added, altered, or supplemented in our production. Our pigments remain pure and uncompromised — 100% natural, stable, and safe.
Rooted in History, Culture, and People
Natural earth pigments are among humanity’s oldest materials. They connect us to ancient craft traditions, vernacular architecture, and artistic expression across centuries and cultures. At Pigmenta Works, we see ourselves as part of this continuum — translating local resources into contemporary applications while honoring the cultural knowledge embedded in the material.
Production & Methods
For more than a thousand years, humans have processed ochre from the earth using methods grounded in patience, gravity, fire, and water. Pigmenta Works continues this lineage, refining historical techniques through careful material control and contemporary production methods.
The ochre is extracted directly from the earth, often from iron-rich deposits collected at water plants, where natural sedimentation concentrates the material. At these facilities, the iron sediment is typically treated as a residual byproduct of the water purification process — a waste stream that must be removed to ensure clean drinking water. Rather than being discarded, this material is recovered and transformed into pigment, giving new value to what would otherwise be waste.
Once gathered, the raw ochre is thoroughly dried. This initial drying stabilizes the material and prepares it for crushing. After drying, the ochre is mechanically crushed into smaller particles, increasing the surface area and enabling more precise refinement.
The crushed material is then washed to remove organic matter and larger, heavier impurities such as sand and stones. Purification is carried out through a traditional process of decantation. Water flows through a series of pipes and channels, gently transporting only the finest and lightest pigment particles. Heavier materials settle out early, while the suspended fine particles remain in the water.
The pigment-rich water is left undisturbed, allowing the fine particles to settle naturally at the bottom through gravity. Once fully settled, the clear water above is carefully removed and recycled for later use. What remains is a dense, purified ochre sediment.
This refined material is left to dry again before entering the kiln. Through controlled firing between 400°C and 1100°C, the iron oxides transform, producing a spectrum of tones ranging from warm reds and deep browns to deep violet hues. Temperature and firing duration determine the final color, allowing for carefully calibrated variation between batches.
After firing, the pigment is milled once more to achieve a consistent, fine powder. It is then packed and prepared for distribution.
The process remains elemental — earth, water, air, and fire — continuing a material tradition that has endured for centuries while remaining rooted in the specific landscapes from which each batch originates.
