Testing Paint Film Preservatives
These test methods are designed to assess the biocidal/ biostatic efficacy of film preservatives in a coating against fungal or algal growth. Using these methods an active ingredient can be evaluated with regard to its inclusion in Annex IA of the Biocidal Products Directive 98/8/EC.
| Fungicidal Efficacy | EN 15457 |
| Algicidal Efficacy | EN 15458 |
Fungicidal Efficacy: EN 15457
Scope and Field of Application
This test method is designed to assess the biocidal/ biostatic efficacy of film preservatives in a coating against fungal growth. Using this method an active ingredient can be evaluated with regard to its inclusion in Annex IA of the Biocidal Products Directive 98/8/EC.
The method described here is semi-quantitative, comparative method between coatings, with and without film preservatives.
The actual standard is a copyright-protected document and we are not able to provide you with a copy. If required however, you can easily obtain one from the British Standards Institution.
Summary of Method
The coating material is applied to a cellulose filter paper, placed on an agar surface and inoculated with a standard fungal spore suspension.
The test pieces are then incubated at 24°C and rated at 7, 14 and 21 days using a 5-point scale ranging from zero to 100% fungal growth.
After incubation conclusions can be drawn as to the fungicidal efficacy of the film preservatives in a coating from the intensity of the fungal growth on the surface of the specimen.
Sample Requirements
We require a 100 ml sample of each film preservative or preserved coating.
Algicidal Efficacy: EN 15458
Scope and Field of Application
This test method is designed to assess the biocidal/ biostatic efficacy of film preservatives in a coating against algal growth. Using this method an active ingredient can be evaluated with regard to its inclusion in Annex IA of the Biocidal Products Directive 98/8/EC.
The method described here is semi-quantitative, comparative method between coatings, with and without film preservatives.
The actual standard is a copyright-protected document and we are not able to provide you with a copy. If required however, you can easily obtain one from the British Standards Institution.
Summary of Method
The coating material is applied to a cellulose filter paper, placed on an agar surface and inoculated with a standard algal suspension.
The test pieces are then incubated at 23°C under daylight fluorescent lighting (16 hours illumination/8 hours darkness) and rated at 14, 21, 28 and 35 days, using a 3-point scale.
After incubation conclusions can be drawn as to the algicidal efficacy of the film preservatives in a coating from the intensity of the algal growth on the surface of the preserved specimen when compared with that on a non-preserved specimen.
Sample Requirements
We require a 100 ml sample of each preservative or preserved coating.
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