VISION-LITE® / VISION-LITE II®
PROCESSING GUIDELINES
MAY 2022
6
Without prior agreement between both parties, applicable defect acceptance criteria under standard
observation conditions (Figures 1.a) and 1.b)) are those described in EN 1096-1:
“Coated glass may be examined in
stock size plates or in cut sizes ready for installation. The examination
may be undertaken in the factory or on site when glazed.
The pane of coated glass being examined is viewed from a minimum distance of 3 m. The actual distance
will be dependent on the defect being considered and on which illumination source is being used. The
examination of the coated glass in reflection is performed by the observer looking at the side which will
be the outside of the glazing. The examination of the coated glass in transmission is performed by the
observer looking at the side which will be the inside of the glazing. During the examination the angle
between the normal to the surface of the coated glass and the light beam proceeding to the eyes of the
observer after
reflection or transmission by the coated glass shall not exceed 30°.”
1.4.2. General observation conditions and acceptance criteria
Coated glass defect types are listed and defined in EN 1096-1 standard. The following definitions
areextracted from this norm:
•
Uniformity defect:
slight visible variation in colour, in reflection or in transmission within a coated
glass pane or from pane to pane;
•
Stain:
defect in the coating larger than punctual defect, often irregularly shaped, partially of mottled
structure;
•
Punctual defects:
punctual disturbance of the visual transparency looking through the glass and
of the visual reflectance looking at the glass. Spots, pinholes and scratches are types of punctual
defects;
•
Spot:
defect that commonly looks dark against the surrounding coating, when viewed in
transmission;
•
Pinhole:
punctual void in the coating with partial or total absence of the coating. Normally
contrasts clear relative to the coating, when viewed in transmission.
•
Scratches:
variety of linear score marks, whose visibility depend on their length, depth, width,
position and arrangements;
•
Cluster:
accumulation of very small defects giving the impression of stain.
1.4.1. Defect types: definitions
1.3. CE-MARKING
1.4. QUALITY CRITERIA
VISION-LITE® range complies with EN 1096-4 harmonised European standard for coated glass.
The Declaration of Performances (DoP) of the products are available on the CE-marking section of
Saint-Gobain Glass web sites and at www.saint-gobain-glass.com/ce.
•
Calculations and recommendations are the same as those for conventional glass sheets (annealed,
tempered, laminated …) assembled in double glazing.
•
Relevant national and local regulations should be complied with.
1.2.2. Thickness recommendations
