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Quick Details

  • Place of Origin: Shandong, China (Mainland)
  • Brand Name: Vatti
  • Model Number: glass tube
  • Size: processing according to requirement, as required
  • Type: Tempered Glass, Insulated Glass
  • Application: Decorative Glass
  • Thickness: 0.8mm-10mm
  • Composition: Stained Glass, Optical Glass
  • size: process with requirement
  • Material: Borosilicate COE3.3 Glass
  • Color: red, opaque black, opaque white, pink,purple, green,yellow, amber,etc
  • feature: high heat resisance
  • Usage: light,Wafer substrates, Biotechnology, Neutron absorbers

Packaging & Delivery

Packaging Details 1)Seaworthy Wooden crates; 2) Polywood Case; 3)Wooden case +carton or plywood +carton
Delivery Time In 20days after we get the advance

2-25mm Heat Resistance High Borosilicate Glass 3.3, High Pressure Resistant Glass, Silk Printing Sight Glass Silk Printed Glass 

Borosilicate glass 3.3 is one of transparent colorless glass, through wavelength is between 300 nm to 2500 nm, transmissivity is more than 90%. Coefficient of thermal expansion is 3.3. It can acid proof and alkali , the high temperature resistant is about 450°C. If course handling , the high temperature resistant can reach 550°C or so. Apply to lighting fixture , chemical industry , electron, high temperature equipment and so on.


Borosilicate glass 3.3 has excellent transmission over the visible and NIR wavelengths working from 310nm to 2700nm. The surface quality is not as high as the BK7 versions.




Borosilicate glass 3.3 has excellent chemical and thermal-shock resistance and has a maximum working temperature of 500°C so are excellent for use in high powered light source applications or an excellent choice for cold and hot mirror substrates.






2.23± 0.02g/cm3



Tensile strength:


Bulk modulus:

93×103 M pa

Modulus of rigidity:


Young's modulus:


Compressive strength:

1200kg/ cm2

Poisson's ratio:


Thermal expansion coefficient:

(0-300℃) (3.3±0.1)x10-6K-1

Coefficient of thermal conductivity:

1.2W×(m×k) -1

Specific heat capacity:

(20-100℃) 00.82kJx(kgxk)

Optical performance:


1. Light transmittance:


2. The refractive index:


        3. The wavelength:

435.8nm=1.481,   479.9nm=1.4772  , 546.1nm=1.4732

Softening point:

810±10 ℃

The resistivity1gρ

250  8.0Ω×cm

Dielectric coefficientε


Dielectric strength


Dielectric loss factor

tanσ(MC20)≤38 ×10-4

Resistance to cold and hot shock


Continuous working temperature


Water resistance:

ISO719           HGB  Level 1

Acid resistance

ISO195           HGB  Level 1

Alkali resistance

ISO695           HGB  Level 2







Substrates for dielectric coatings
Lighting applications
Optical filter coating substrates
Wafer substrates
Anodic bonding applications
Environmental technology
Harsh environments
Neutron absorbers
Measurement and sensor technology


borosilicate glass 3.3

Composition and physical characteristics 

Borosilicate glass 3.3 has a very low thermal expansion coefficient, about one-third that of ordinary glass. This reduces material stresses caused by temperature gradients, thus making it more resistant to breaking. This makes it a popular material for objects like telescope mirrors, where it is essential to have very little deviation in shape. It is also used in the processing of high-level nuclear waste, where the waste is immobilised in the glass through a process known as vitrification (contrast with Synroc). 

Borosilicate glass 3.3 begins to soften around 821°C (1510°F); at this temperature, the viscosity of type 7740 Pyrex is 107.6 poise. 

Borosilicate glass 3.3 is less dense than ordinary glass. 

While more resistant to thermal shock than other types of glass, borosilicate glass can still crack or shatter when subject to rapid or uneven temperature variations. When broken, borosilicate glass tends to crack into large pieces rather than shattering (it will snap rather than splinter). 

Optically, borosilicate glasses are crown glasses with low dispersion (Abbe numbers around 65) and relatively low refractive indices (1.511.54 across the visible range)











VATTIGLASS Competitive Advantages:

1. 15 years experiences on glass manufacturing and exporting.

2. Top quality glass with CE certificate, exporting to more 60 countries in the world.

3. Unique designed strong wooden cases, solving the problems of breakage.

4. Near to QingDao  of China main container seaports, ensuring convenient loading and rapid delivery.

5. Full range of flat glass supply, offering one-stop purchase.

6. Professional sales team, offering personalized and dedicated services.



If you choose us we can give you the best quality and service.


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