Search results
Results From The WOW.Com Content Network
Domestic windows were generally small and were made of broad glass or cylinder glass before crown glass was first made in England in 1678. Broad glass is usually around 1.5 to 2 mm thick and uneven, often with scars and marks on the surface where it has been 'ironed' flat, and often has a greenish tint.
There are a number of works with England's Looking Glass in the title. During the 16th and 17th centuries looking glass, meaning mirror, [1] was frequently used in the titles of books. [2] [3] Thomas Lodge and Robert Greene, A Looking Glass for London and England (c.1590), an Elizabethan era stage play; Edmund Calamy the Elder, England's ...
Cut glass wine glass made of lead glass. Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. [1] 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. [2]
Glass has three major components: a network former (silica), a network modifier (), and a network stabilizer (predominantly lime). [7] [8] In the early 16th and 17th centuries glassmaking (the manufacture of glass from raw materials) and glassworking (the creation of objects from glass) occurred within the same glasshouse. [9]
Came glasswork includes assembling pieces of cut and possibly painted glass using came sections. The joints where the came meet are soldered to bind the sections. When all of the glass pieces have been put within came and a border put around the entire work, pieces are cemented and supported as needed. [1]
The use of lead in glass was known in Italy as proved by 12% lead being discovered in the white cameo layer of The Portland Vase, a famous Roman artefact in the British Museum [7] Others point out that the process was documented in an Italian book, L'Arte Vetraria, written by Antonio Neri in 1612 was translated into English by Christopher ...
Leaded glass may refer to: Lead glass , potassium silicate glass which has been impregnated with a small amount of lead oxide in its fabrication Lead came glasswork , glass panels made by combining multiple small pieces of glass, which may be stained, textured or beveled, with cames or copper foil
An achromatic doublet, which combines crown glass and flint glass. A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet lens because of their compensating optical properties , which reduces chromatic aberration (colour defects).