Geographic Attribution Through Regional Degradation Patterns

Climate Writes the History

Every textile carries the environmental signature of the places it has been. A textile that spent a century in a specific climate shows the specific degradation effects of that climate — effects that differ measurably from what the same textile would show if it had spent that century somewhere else.

Regional Degradation Signatures

Humid tropical (Southeast Asia, equatorial regions):

• Heavy humidity degradation (hydrolysis, mold traces)
• Moderate UV (filtered by atmospheric moisture and vegetation)
• Biological activity (mold, insect damage)
• Warm temperatures accelerating all degradation

Arid (Central Asia, Middle East, North Africa):

• Intense UV degradation (clear skies, strong sunlight)
• Minimal humidity effects
• Minimal biological activity
• Wide temperature cycling (hot days, cold nights)

Temperate maritime (UK, Northern Europe, Japan):

• Moderate UV
• Moderate-high humidity
• Moderate biological activity
• Atmospheric pollutant effects (especially in industrial regions)

Continental (Russia, inland Europe, inland North America):

• Moderate UV (seasonal — intense summers, weak winters)
• Low to moderate humidity (seasonal)
• Temperature extremes (hot summers, cold winters — cycling stress)
• Variable pollutant levels

Authentication Application

If a textile is claimed to originate from arid Central Asia but shows:

• Heavy humidity degradation
• Mold traces
• Minimal UV fading
• No temperature cycling stress

The degradation pattern is inconsistent with the claimed origin. The textile may have spent significant time in a humid climate — either because the provenance is incorrect or because the storage history includes periods in different climates.

Modeling Regional Degradation

The degradation model can be configured with regional environmental parameters:

• Set UV level, humidity, temperature range, and pollutant exposure to match a specific region
• Generate the expected degradation for that region over the claimed timespan
• Compare to the actual textile's degradation state
• Assess consistency

This regional modeling adds geographic evidence to the authentication assessment, complementing dye identification, mordant analysis, and construction analysis.

Ready to model region-specific degradation for geographic authentication? Join the PigmentBoard waitlist.