This draft defines a test method to establish the self-cleaning performances and classes for coatings on glass
which utilise sun, rain or a combination of sun and rain to enhance the cleanliness of the glass.
The draft applies to coated glass for use in outdoor building applications. The test is designed to be applicable
for coatings on glass which use hydrophilic or photocatalytic active functionalities to enhance the cleanliness
of the glass.
The test procedure does not specifically address the durability of the coatings self cleaning functionality.
The test method is designed to be run on monolithic samples of the products. In cases where dual coated
products (that is, a glass presenting self cleaning coating on one side and another coating on the other side)
exist it would be necessary to obtain the equivalent glass with only the self cleaning coating on one side (or to
remove the back side coating by polishing, providing it does not damage the self cleaning coating on the
opposite side). If not possible, adapted protection of back side coating should be added (such as protective
film with electrostatic or low adhesive charge,or DGU assembly)
For tinted glass and absorbing layers (a self cleaning or dual coatings) the luminous absorption might affect
the haze measurements. The test has to be runned on clear glass and extrapolation will be made for tinted
glass and absorbing layers.
Registration number (WIID)
33123
Scope
This draft defines a test method to establish the self-cleaning performances and classes for coatings on glass
which utilise sun, rain or a combination of sun and rain to enhance the cleanliness of the glass.
The draft applies to coated glass for use in outdoor building applications. The test is designed to be applicable
for coatings on glass which use hydrophilic or photocatalytic active functionalities to enhance the cleanliness
of the glass.
The test procedure does not specifically address the durability of the coatings self cleaning functionality.
The test method is designed to be run on monolithic samples of the products. In cases where dual coated
products (that is, a glass presenting self cleaning coating on one side and another coating on the other side)
exist it would be necessary to obtain the equivalent glass with only the self cleaning coating on one side (or to
remove the back side coating by polishing, providing it does not damage the self cleaning coating on the
opposite side). If not possible, adapted protection of back side coating should be added (such as protective
film with electrostatic or low adhesive charge,or DGU assembly)
For tinted glass and absorbing layers (a self cleaning or dual coatings) the luminous absorption might affect
the haze measurements. The test has to be runned on clear glass and extrapolation will be made for tinted
glass and absorbing layers.
