Product type: Special Glass/High-Temperature-Resistant Glass. Application: Fireplace, Solar, Laboratory, Sight Glass, etc.. Model: HG- HG01. Function: Optical Function, Thermal Function, Mechanics and Mechanical Function, Biological and Chemical Function.
Overview
The 3mm 4mm Clear Borosilicate Stage Lighting Lens Commercial Downlight HID Lamp High Transmittance Optical Heat Resistant Custom Cut Polished Tempered Glass is supplied as a lighting protective glass made from Borosilicate 3.3 or Borosilicate 4.0. Listed geometry: flat & curved shape. Listed for Home Appliances, Electronics and Industry applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Type | Special Glass/High-Temperature-Resistant Glass |
|---|---|
| Shape | Flat & Curved |
| Application | Home Appliances/Electronics/Industry |
| Usage | Fireplace, Solar, Laboratory, Sight Glass, etc. |
| Model NO. | HG- HG01 |
| Structure | Solid |
| Moh's Hardness | 6.5 |
| Function | Optical Function, Thermal Function, Mechanics and Mechanical Function, Biological and Chemical Function |
| Transparency | Transparent |
| Processing Method | Phase & Crystallization |
| Preparation Process | Fusion Method |
| Color | Black/Clear/White |
| Glass Type | Borosilicate 3.3 or Borosilicate 4.0 |
| Quantity | Number of Pieces or Square Meters |
| Edge & Shape | Polished Edge/Custom Shape/ Round Corners? |
| Drilling / Cutouts | Hole Size and Position (If Needed) |
| Thermal Shock | up to 700c |
| Processing | Cutting, Edging, Drilling |
| Destination Country | for Accurate Shipping Quote |
| Continuous Temp | 450c |
| Dimensional Tolerance | 0.5mm |
| Fireplace/stove | 4-5mm; Lighting: 2-5mm |
| Dimensional check | length, width, thickness, diagonal |
| Edge inspection | no chips, cracks, or uneven grinding |
| ISO 9001 | 2015 quality management |
| Equipment for your borosilicate order | CNC cutting machines for precision custom shapes up to 1830x2440mm |
| What you get | Engineering review of your drawings before cutting |
| Borosilicate 3.3 | 450C continuous, 500C short-term, 200C+ thermal shock. For temperatures above 500C continuous, consider ceramic glass (up to 700C+). |
| Supplier | Qingdao Hitech Glass Co.,Ltd |
Technical data
| Parameter | Specification | Your Options |
| Glass Type | Borosilicate 3.3 / 4.0 | 3.3 standard; 4.0 fire-rated |
| Thickness | 1.5mm – 25mm | Fireplace/stove: 4-5mm; Lighting: 2-5mm |
| Max Sheet Size | 1830 x 2440mm | Custom cut to any dimension |
| Shape | Flat or curved/arched | Rectangle, arch, round, custom |
| Thermal Expansion | 3.3 x10-6/K (20-300C) | 1/3 of ordinary glass |
| Continuous Temp | Up to 450C | Short-term up to 500C |
| Thermal Shock | 200C+ delta T | Survives rapid temp shifts |
| Light Transmittance | 92%+ at 3mm | Crystal clear, no green tint |
| Softening Point | 820C | Annealing point 560C |
| Density | 2.23 g/cm3 | Mohs hardness 6.5 |
| Edge Treatment | Polished, beveled, pencil | Flat edge also available |
| Certification | ISO 9001 | CE, CCC on request |
| Application | What We Supply | Recommended Specs |
| Fireplace and wood stove windows | Flat or arched panels, cut to door opening | 4-5mm, polished edge, optional black border print |
| Pellet stove and insert doors | Custom shapes with mounting holes | 4mm, drilled per drawing |
| Oven and microwave door panels | Heat-resistant clear panels | 3-5mm, polished or flat edge |
| Industrial furnace and boiler sight glass | Round or rectangular windows | 5-12mm, beveled edge, pressure-rated options |
| Stage and studio lighting lenses | Flat or curved heat-resistant covers | 2-5mm, optical clarity, custom shape |
| HID, halogen and LED lamp covers | Protective outer lenses | 1.5-4mm, heat-formed curves available |
| Spotlight and flashlight lenses | Precision-cut clear discs | 2-5mm, polished edge |
| Fire-rated building glass | Borosilicate 4.0 panels for doors and partitions | 6-12mm, CCC compliant |
| 3D printer build plates | Flat borosilicate sheets | 3-5mm, flat ground surface |
| Annealing Point | 560C | |
| Strain Point | 520C | |
| Refractive Index | 1.47 | |
| Light Transmittance (2mm) | 92%+ | |
| Elastic Modulus | 76 KN/mm2 | |
| Thermal Conductivity | 1.2 W/(m.K) | |
| Specific Heat | 0.9 J/(g.K) | |
| Thermal Shock Resistance | Withstands 200C+ sudden temperature change | |
| Water Resistance (ISO 719) | Grade 1 | |
| Acid Resistance (ISO 195) | Grade 1 | |
| Alkali Resistance (ISO 695) | Grade 2 | |
| Color | Clear / Ultra-clear | |
| Surface | Smooth, fire-polished or float finish | |
| Shape | Flat & Curved | |
| Processing Capabilities | Silk Screen Printing, Drilling & Edge Grinding, Hot Bending, Heat-Strengthened Bending (Curved Tempered) |
What to specify when you request a quote
- Glass type and thickness — listed as “Borosilicate 3.3 or Borosilicate 4.0”; name the glass (soda-lime, aluminosilicate, borosilicate) and thickness.
- Strengthening — state thermal tempering or chemical strengthening and the required surface compression or impact rating.
- Printing and coatings — listed as “Fireplace, Solar, Laboratory, Sight Glass, etc.”; list silk-screen colours, windows, and any AR / AG / AF coating.
- Outline and edges — listed as “Flat & Curved”; send a drawing with cut-outs, holes and edge finish.
- Optical requirements — give transmission, haze or gloss targets for the viewing area.
Engineering guides for this part
For material grades and coating options, see Custom Borosilicate Glass Sheets Cut to Size: Precision and Performance. How parts like this are machined and finished is covered in Optical Glass Polishing for High Clarity Surfaces. For an application example, read Precision Laser Cut Glass Covers for Appliance LED Displays. Before sending a drawing, check Thermal Conductivity of Quartz Glass & Fused Quartz: A Process Guide. A related standard product is LED Groove Cover Glass.
FAQ
What is the 3mm 4mm Clear Borosilicate Stage Lighting Lens Commercial Downlight HID Lamp High Transmittance Optical Heat Resistant Custom Cut Polished Tempered Glass made of? expand_more
It is listed as Borosilicate 3.3 or Borosilicate 4.0. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.
Where is this lighting protective glass used? expand_more
Listed applications: Home Appliances, Electronics and Industry.
What should I include in a quote request? expand_more
Include glass type and thickness, strengthening, printing and coatings, outline and edges and optical requirements, plus quantity and a drawing if the part is custom.
