Fraunhofer Institute for Building Physics
Product-specific isopleth ranges
Building Chemistry, Building Biology, Hygiene
| Measurement | Acquisition of the natural resistance of a product against infestation by microorganisms (mould and mildew) through assessment of the product specific isopleth ranges |
| Standard | Own testing method, published |
| Measurement object | Special designed specimen (dimension 5 × 5 cm, for loose material filling into special wire frames), 36 specimen shall be provided |
Technical data
| Area of test specimen | 25 cm2 |
| Thickness of test specimen | Typically 1 to 3 cm |
| Processing | According to given requirements |
| Test climate | For 100 days, 12 different combinations of temperature and relative humidity (adjustable ranges from +8 to +40 °C and 50 to 98 % r.h.) |
| Test duration | 14 weeks |
Special features
| Test strains | According to material/application “typical” test strains from own collection, apart from fungi also bacteria or algae (light source available) possible |
| Conditioning | On request also special conditioning possible: accelerated carbonation, watering, etc. |
More information
Result presentation as so called “isopleth traffic light”
Further tests in context:
- testing on photo-catalytic efficacy
- testing of biocidal activity on the surface
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