The brilliance of lead crystal relies on the high refractive index caused by the lead content. The density of soda glass is 2.4 g/ cm 3 (1.4 oz/cu in) or below, while typical lead crystal has a density of around 3.1 g/cm 3 (1.8 oz/cu in) and high-lead glass can be over 4.0 g/cm 3 (2.3 oz/cu in) or even up to 5.9 g/cm 3 (3.4 oz/cu in). Lead also raises the density of the glass, being over 7 times as dense as calcium. The attractive optical properties of lead glass result from the high content of the heavy metal lead. The addition of lead oxide to glass raises its refractive index and lowers its working temperature and viscosity. Products with less lead oxide, or glass products with other metal oxides used in place of lead oxide, must be labelled 'crystalline' or 'crystal glass'. Only glass products containing at least 24% of lead oxide may be referred to as 'lead crystal'. In the European Union, labelling of 'crystal' products is regulated by Council Directive 69/493/EEC, which defines four categories, depending on the chemical composition and properties of the material. One alternative material is modern crystal glass, in which barium oxide, zinc oxide, or potassium oxide are employed instead of lead oxide. Lead crystal glassware was formerly used to store and serve drinks, but due to the health risks of lead, this has become rare. This naming convention has been maintained to the present day to describe decorative holloware. It is retained from the Venetian word cristallo to describe the rock crystal ( quartz) imitated by Murano glassmakers. The use of the term lead crystal remains popular for historical and commercial reasons, but this term is sometimes changed to simply crystal because of lead's reputation as a toxic substance. The term lead crystal is, technically, not an accurate term to describe lead glass, because glass lacks a crystalline structure and is instead an amorphous solid. In marketing terms it is often called crystal glass. Lead glass is often desirable for a variety of uses due to its clarity. Lead glass contains typically 18–40% (by mass) lead(II) oxide (PbO), while modern lead crystal, historically also known as flint glass due to the original silica source, contains a minimum of 24% PbO. Let yourself be enchanted by our unique combination of tradition, beauty and functionality, which will take your taste experience to a new dimension.Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. Each colorful crystal glass is not only a utility item, but also art that emphasizes the uniqueness of moments spent with loved ones. We invite you to discover the richness of our collection, where the tradition of Polish craftsmanship meets an innovative approach to design. Colorful details give them a modern and stylish expression, making them not only practical vessels for tasting drinks, but also unique decorative elements.

Our crystal glasses exude elegance and luxury, at the same time being the pride of Polish craftsmanship heritage. Unique colorful crystal glasses Each glass is carefully and precisely handmade, which makes each piece unique. Our colorful crystal glasses not only represent the highest quality aesthetics, but are also individually handmade, constituting a unique masterpiece of Polish craftsmen. 1 277 / 5 000 Wyniki tłumaczenia Tłumaczenie Colorful crystal glasses are a unique combination of prestige and craftsmanship, where traditional Polish heritage meets modern design.

Crystal glasses