![]() ![]() ![]() The standard definition of a glass (or vitreous solid) is a solid formed by rapid melt quenching. Main article: Structure of liquids and glasses Extruded glass fibres have application as optical fibres in communications networks, thermal insulating material when matted as glass wool so as to trap air, or in glass-fibre reinforced plastic ( fibreglass). The refractive, reflective and transmission properties of glass make glass suitable for manufacturing optical lenses, prisms, and optoelectronics materials. Glass can be coloured by adding metal salts or painted and printed with vitreous enamels, leading to its use in stained glass windows and other glass art objects. In its most solid forms, it has also been used for paperweights and marbles. Due to its ease of formability into any shape, glass has been traditionally used for vessels, such as bowls, vases, bottles, jars and drinking glasses. The earliest known glass objects were beads, perhaps created accidentally during metalworking or the production of faience. Archaeological evidence suggests glassmaking dates back to at least 3,600 BC in Mesopotamia, Egypt, or Syria. Some objects, such as drinking glasses and eyeglasses, are so commonly made of silicate-based glass that they are simply called by the name of the material.ĭespite being brittle, buried silicate glass will survive for very long periods if not disturbed, and many examples of glass fragments exist from early glassmaking cultures. ![]() The term glass, in popular usage, is often used to refer only to this type of material, although silica-free glasses often have desirable properties for applications in modern communications technology. Soda–lime glass, containing around 70% silica, accounts for around 90% of manufactured glass. The most familiar, and historically the oldest, types of manufactured glass are "silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand. Glass is most often formed by rapid cooling ( quenching) of the molten form some glasses such as volcanic glass are naturally occurring. It has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. In case repair or replacement is impossible or undesirable, we will discuss if an appropriate reduction of the price or the return of the product at our costs against a refund of your payment for the product, would be a reasonable solution.Glass is a non-crystalline solid that is often transparent, brittle and chemically inert. If we determine that the defect is within reason and covered under the warranty, we will either repair or replace the product free of charge. A clear and accurate description of the claim will help us respond in a swift and appropriate manner. Please submit your claim as soon as possible after you detect the defect. In case of any defect, you can contact us via the contact form. Should you so wish, you can minimize the scratches by placing the sunglasses in their pouch after wearing them. Therefore, small scratches may occur during normal use, and are not a non-conformity. We have made the frame with HDPE plastic collected from the ocean. Please note that the material we have used for these sunglasses is different than the (virgin) plastic that is usually used in sunglasses’ frames. Additionally, alterations to the product (such as inserting prescription lenses) will also void the warranty. Damage due to your acts or omissions or due to an accident, namely damage for which you can be held responsible, does not fall under this warranty. Normal wear and tear, including scratches on the lenses or frame, is excluded from the warranty. Subject to the Terms and Conditions that apply in the region you live in, this warranty does not affect any statutory right you may have under the laws of the country you live in. The warranty covers the product against defects resulting from faults in material or workmanship for two years after your purchase. We have designed and constructed your product with care, and we hope you will enjoy it for a long time. ![]()
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