Definitions for lead glass
lɛdlead glass

Princeton's WordNetRate this definition:0.0 / 0 votes

1. lead glassnoun

   glass containing lead oxide; has a high refractive index

WikipediaRate this definition:0.0 / 0 votes

1. Lead glass

   Lead glass, commonly called crystal, is 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 often desirable for a variety of uses due to its clarity. In marketing terms it is often called crystal glass. 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. The use of the term lead crystal or just "crystal" remains popular for historical and commercial reasons, and because "lead" sounds toxic to consumers. It is retained from the Venetian word cristallo to describe the rock crystal (quartz) imitated by Murano glassmakers. This naming convention has been maintained to the present day to describe decorative hollow-ware.Lead crystal glassware was formerly used to store and serve drinks, but due to the health risks of lead, this has become rare. One alternative material is modern crystal glass, in which barium oxide, zinc oxide, or potassium oxide are employed instead of lead oxide. In the European Union, labeling 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. Only glass products containing at least 24% of lead oxide may be referred to as "lead crystal". Products with less lead oxide, or glass products with other metal oxides used in place of lead oxide, must be labeled "crystalline" or "crystal glass".

ChatGPTRate this definition:0.0 / 0 votes

1. lead glass

   Lead glass, also known as lead crystal or crystal glass, is a type of glass made by adding lead oxide to the molten glass during its manufacturing process. This addition increases the glass's index of refraction and makes it sparkle and scatter light much like a diamond. Lead glass is often used in decorative objects such as drinkware, jewelry, chandeliers, and optical devices. However, it does pose a health risk if used in containers for food and beverages due to the potential for lead leaching.

WikidataRate this definition:0.0 / 0 votes

1. Lead glass

   Lead glass is a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass contains typically 18–40 weight% lead oxide, 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. Originally discovered by Englishman George Ravenscroft in 1674, the technique of adding lead oxide improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel. This technique also increased "working period" making the glass easier to manipulate. Technically, the term crystal is not applied to glass, as glass, by definition, lacks a crystalline structure. The use of the term lead crystal remains popular for historical and commercial reasons. It is retained from the Venetian word cristallo to describe the rock crystal imitated by Murano glassmakers. This naming convention has been maintained to the present day to describe decorative hollow-ware. Due to the potential health risks of lead that it contains, true lead crystal glassware is rare nowadays. One material that is commonly used to manufacture glassware and referred to as "crystal" is lead-free crystal glass. In lead-free crystal glass, barium oxide, zinc oxide, or potassium oxide are employed instead of lead oxide. Lead-free crystal has a similar refractive index to lead crystal, but it is lighter and it has less dispersive power. In the European Union, labeling 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. Only glass products containing at least 24% of lead oxide may be referred to as "lead crystal". Products with less lead oxide, or glass products with other metal oxides used in place of lead oxide, must be labeled "crystallin" or "crystal glass".

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How to pronounce lead glass?

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How to say lead glass in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of lead glass in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of lead glass in Pythagorean Numerology is: 8

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=lead glass
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Lead_Glass
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=lead glass