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SEPAP Photoaging

The SEPAP test devices were developed based on numerous studies concerning the photo-aging processes affecting polymer materials by analyzing the chemical changes at the molecular level exposed to both climatic stress and accelerated conditions. This allows service life prediction of polymers as well as development of photo-stable formulas in a short amount of time.

Designed as an analytical tool to understand the degradation mechanisms of naturally aging polymers at the molecular level, the SEPAP unit replicates the chemical changes in accelerated, controlled lab conditions that are achieved through long-term, natural weathering conditions, from which similar changes in macroscopic properties (mechanical, esthetical , etc.) can be expected.

Advanced analytical and chemical expertise, experience, and material database are usually required to make the SEPAP methodology work best.



The SEPAP MHE is designed to perform accelerated photoaging of polymers with the aim of understanding the aging mechanisms of polymers exposed outdoors and examining the chemical evolution at a molecular level. Using a mercury vapor lamp, the SEPAP MHE is able to replicate and accelerate the chemical mechanisms responsible for the gradual loss in properties of polymers during their lifetime. The SEPAP MHE is capable of operating at irradiance levels between 90 W/m² and 300 W/m² (290 - 420 nm).


  • Mercury vapor lamp (1000 W)
  • 1040 cm² specimen rack capacity
  • Irradiance range 90 - 300 W/m² (290 nm - 420 nm)
  • Precise control of irradiance, Black Standard Temperature (BST) and chamber temperature
  • Radio-controlled on-rack light and BST monitor XENOSENSIV
  • Chamber temperature range up to 70 °C
  • BST range up to 100 °C
  • Full color multi-lingual user interface
  • Relative humidity control using ultrasonic humidifiers (SEPAP MHE+)
  • Relative humidity range 10 - 95% (SEPAP MHE+)
  • Specimen spray with 60 liter integrated water reservoir (SEPAP MHE+)


  • SEPAP MHE Filter (Daylight filter extended IR)
  • XenoCal® 300-400 BST
  • Sample Holder Kit
  • Mercury Vapor Lamp


The listed standards and specifications may include several alternative testing options. The instrument meets at least one option in any listed standard. Standards are subject to change without notification, which may result in a change in testing technology. Always check the revision status of a standard with the responsible Standards Development Organization. If unsure about instrument compliance, please contact your local sales representative.

  • D27 3064

    Performing an accelerated photo-ageing test in SEPAP chamber 12/24

  • D27 5435

    Revetements de peintures sur caoutchouc aging artificial en enceinte SEPAP

  • DIN EN 13206

    Covering thermoplastic films for use in agriculture and horticulture

  • DIN EN 16472

    Plastics - Method for artificial accelerated photoaging using medium pressure mercury vapor lamps

  • EN 50289-4-17

    Communication cables - Specifications for test methods - Part 4-17: Test methods for UV resistance evaluation of the sheath of electrical and optical fibre cable

  • ISO 10640

    Plastics - Method of assessing accelerated photoaging by FTIR and UV/visible spectrometry

  • NF C 32062-1

    Electronic components - Low corrosive materials for insulation and sheath used in communication cables with particular fire related properties

  • NF EN 13207

    Silage thermoplastic films


  • Additives & Colorants
  • Plastics

Standard Instruments

  • Xenon arc Weathering Testing
  • Fluorescent / Accelerated UV Testing
  • Corrosion Cabinets
  • Flammability Chambers
  • SEPAP Photoaging
  • UVCTest Material Exposure Instrument

Technical Resources

SEPAP MHE Brochure (English, PDF)

SEPAP MHE Brochure (English, PDF)


SEPAP MHE Brochure (French, PDF)

SEPAP MHE Brochure (French, PDF)


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