Note: This is a machine-translated version of the original German text. The translation was generated with AI assistance. In case of any discrepancy, the German original shall prevail.

This is a summary. You can find the full article here.

How PNZ actively manages water, energy and waste – and why the circular economy is not a programme item for us, but a mindset that runs through every aspect of our work. PNZ has been producing in the heart of the Altmühltal Nature Park for over 50 years. What we release into nature must be clean.

At a glance:

• Zero water law complaints in 50+ years
• –80 % cleaning waste through NatureTec©
• –30 % energy consumption/kg of product since 2012
• 100 % green electricity in production
• 100 % PCR-HDPE for plastic containers

Chapter 01 — Water, Energy & Waste

PNZ can precisely measure, control and systematically reduce all three consumption categories – the result of consistent in-house development and a holistic understanding of production since its founding in 1970.

Water

The PNZ manufactory is located directly on the Birktalbach stream in the Altmühltal Nature Park. This special location is an obligation and a daily benchmark for PNZ.

• Treatment of all production wastewater in a multi-chamber wastewater treatment system with coalescing separator
• Discharge of wastewater at drinking water quality – permanent comparison with the drinking water regulation
• 24/7 real-time sensors (in-house development with Fraunhofer IPA / Eco Hub, since 2024)
• Monthly independent sampling – not a single complaint in the past 5 years
• Semi-annual system inspection; results are reported to the water authority
• The water authority has switched PNZ to self-monitoring – an expression of trust built over many years

Energy

• 100 % green electricity across all production – Scope 2 emissions = zero
• Electricity consumption reduced by ~30 % per kg of product produced since 2012
• Replacement of compressed air system (2025): significantly more efficient system
• Central sensors and data capture for all energy sources under development (2026)
• Modernisation of heating system and building envelope planned

Waste & Circular Economy

PNZ has developed the NatureTec©-process – the first fully circular cleaning process for container cleaning in paint production:

• In-house developed cleaning agent: –77 % waste · –100 % solvents · –99 % CO₂ · –90 % costs
• Closed-loop container cleaning with up to 50 cycles without replacement
• Internal wastewater treatment plant (Eco Hub) with 24/7 sensors (Fraunhofer IPA)
• Total: 80 % of cleaning waste saved
• Strict waste separation; exclusively certified specialist waste disposal companies from the region
• 100 % PCR-HDPE for all plastic containers since August 2023
• First zero-waste wall paint (with Zentek, 2023)

Chapter 02 — Circularity

The circular economy is a mindset for PNZ that was already here long before the term itself existed. We are honest enough to admit that we are far from finished. But we are doing it.

The core idea: separating biosphere and technosphere

Materials from the technosphere – synthetic materials such as plastics and metals – must remain reusable and must not enter the biosphere in an uncontrolled manner. This is the core of Cradle to Cradle and our guiding principle in product development.

Packaging: tinplate, recycled materials, less is more

• Tinplate as the preferred material: over 90 % recycling rate in Germany; permanent metal without downcycling
• 100 % PCR-HDPE for plastic containers since August 2023 – no virgin raw material
• Online shipping packaging without plastic: 50 % less cardboard, completely plastic-free
• B2B shipping carton return programme since 2025: pre-paid return carton, up to 10 reuses
• PNZ Packaging Index since 2021: fact-based CO₂ assessment of all packaging decisions

Cradle to Cradle

Several PNZ products are certified to the Cradle to Cradle standard, including PNZ Oil (Gold, 2022): over 95 % renewable, regional raw materials. In 2025, the first factory-applied impregnation for an international WPC manufacturer followed, certified to Cradle to Cradle Gold.

What we have not yet solved

A complete deposit or reuse system for containers is not yet structurally feasible in the German paint trade. Not every product can be switched to fully renewable raw materials in the short term. These are issues that concern us – and we are working on them. PNZ regularly publishes the thinking behind these decisions on timberlove.blog – including the areas where there is still no good solution.