What is the use of hard glass?

Uses:- Hard glass is used for making hard glass laboratory apparatus. It is prepared by fusing potassium carbonate, lead oxide and silica. Uses:- It is used for making lenses which are used in spectacles, cameras, microscopes, telescopes and other optical instruments. It is also used for making glass prisms.

Which is known as soft glass?

Soft glass is also referred to as soda-lime glass and hard glass is generally referred to as borosilicate glass. Hence, the soft glass consists of soda (known as sodium oxide) and silica (silicon dioxide) and lime (calcium dioxide).

What are soft glass bongs?

“Soft Glass” refers to the manufacturing process – made in the same way as a vase – spun, not blown like borosilicate. The glass is weaker, but often thicker to compensate.

What do you mean by hard glass?

borosilicate glass
Glass that is made so as to be particularly hard; (in later use) specifically borosilicate glass, which is especially resistant to the effects of heat and chemical action.

Does borosilicate glass break easily?

Borosilicate glass is superior 69\%), which makes it even less susceptible to fractures. In terms of temperature, the maximum thermal shock range (the difference in temperatures it can withstand) of borosilicate glass is 170°C, which is about 340° Fahrenheit.

Which is known as hard glass?

Explanation: Potash-lime glass is also known as hard-glass. It is also called Bohemian-glass. It is used to manufacture combustion tubes and other glass articles which have to withstand high temperatures. Explanation: Potash-lime glass is a mixture of calcium silicate and potassium silicate.

Why is soft glass tubing not used?

The use of soft glass tubing has been fading, owing partly to environmental concerns and health risks but mainly to the adoption of borosilicate glass by most lampworkers, especially since the introduction of colored glasses compatible with clear borosilicate.

What is the difference between soft coat glass and hard coat glass?

With the advance in technology, soft coat glasses are now made which can also be used in monolithic form (single glazed) with much improved life for the coating, but still the life of the coating cannot match with that of hard coat glass in monolithic applications. Soft coat glass also has problems while tempering when compared to hard coat glass.

What is the difference between hard coated and soft coat low E?

Soft coat Low E glasses such as Viridian LightBridge™ or PerformaTech™ have significantly lower U values than hard coated pyrolytic glass types. Hard-coated Low E glasses are manufactured online during the float manufacturing process where soft coats are applied by a special offline process at some time after the glass has been manufactured.

Can soft coated low E glasses be glazed?

Soft coated Low E glasses cannot be glazed in single glazed applications but hard coated products such as ComfortPlus™ and EnergyTech™ can. Pyrolytic coatings have a long shelf life, whereas soft coated Low E glasses do have a shelf life and will begin to break down if stored for too long without being incorporated into double glazed units.

Why does glass heat up when heated?

It tends to show up a problem called lensing, which happens because the coated surface of the glass reflects Infra Red radiation and heats up differently than the lower surface (which is heated). http://www.pilkington.com/the+americas/usa/english/building+products/for+architects/faqs/default.htm