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Glass quality

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How glass quality is assessed: UNI EN ISO standards

In the case of transparent glass, the visual examination must be carried out on the product installed or placed in a similar position, from a distance of 1 metre (100 cm), at right angles to the surface to be examined, with diffuse natural light opposite the door to the observer or artificial lighting provided it is diffuse. Sources of illumination directed directly onto the product or the part of it to be highlighted are not permitted.

In the case of glass that has been rendered non-transparent by secondary processing [acid-etched, reflective, sandblasted, lacquered glass, etc.], the visual examination shall be carried out on the installed product or glass placed in a similar position, from a distance of 1.5 m, at right angles to the surface to be examined, with diffuse natural light opposite the door in relation to the observer or artificial lighting provided that it is diffuse. examined, with diffuse natural light opposite the door to the observer or artificial lighting provided that it is diffuse. Sources of illumination directed directly onto the product or the part of it to be highlighted are not permitted.

Attention: Warnings on glass characteristics

The etched/satin-finished glass has the characteristic of having a porous side, which is notoriously more difficult to clean than the smooth side of the glass. Precisely because of this porous characteristic, small halos/marks may appear, visible especially against the light and at close range.

This particularity is to be understood as a characteristic of the glass and cannot be disputed, so be aware of this peculiarity common to all acid-etched/satin-etched glass.
It is advisable to make fitters aware of the need not to touch the glass with dirty or sweaty hands. We therefore recommend wearing clean gloves during installation, which are suitable for handling glass. For customers wishing to have glass that is easier to clean, we recommend choosing glass that does not have any painted/satinised parts, e.g. milk-white laminated diffuser glass, or back-lacquered, transparent and/or smoked transparent glass.

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