Lead glass, commonly called crystal, –  a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass contains typically 18–40% (by weight) 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. Lead glass is desirable owing to its decorative properties.

Source: Italian

Plural: kristalli

Kristall di rokka

Flint glass:  an optical glass that has relatively high refractive index and low Abbe number. Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less. The currently known flint glasses have refractive indices ranging between 1.45 and 2.00.

Kristall fin

Polished plate glass: a type of hand-made glass. It is produced by casting glass onto a table and then subsequently grinding and polishing the glass.

Ref: JA

Kristall katidral

Cathedral glass: the name given commercially to monochromatic sheet glass. It is thin by comparison with slab glass, may be coloured, and is textured on one side. The name draws from the fact that windows of stained glass were a feature of medieval European cathedrals from the 10th century onwards.


Kristall matt

Sandblasted glass:  is produced by bombarding the glass surface with small hard particles to create a frosted aesthetic. 

Kristall mezzu fin

Flat drawn or machine drawn glass: In 1901-1902 the Belgian engineer Èmile Fourcault (1862-1919) and Èmile Gobbe developed a prototype for a machine for preparing cylinder glass in the family’s glass factory in Dempreny. The machine consisted of several large rollers that vertically drew the glass flat. The dimensions could reach 40 x 11 metres (about 130 x 36 feet).