DeutschJGS1, JGS2 and JGS3 Quartz Grades Explained
JGS1, JGS2 and JGS3 are the common Chinese national standard designations for transparent fused quartz glass grades. International buyers frequently meet these names when sourcing quartz from China, so understanding the differences helps you specify the right material.
Grade Comparison
| Grade | Transmission Range | Bubble / Inclusion Level | Typical Applications |
|---|---|---|---|
| JGS1 (UV grade) | Deep UV to near IR (≈185–2500 nm) | Very low — almost no bubbles | UV optics, precision windows, laser components |
| JGS2 (optical grade) | ≈220–2500 nm | Low — few small bubbles allowed | General optical components, labware, sight glass |
| JGS3 (IR / industrial grade) | ≈260–3500 nm | Higher — more bubbles permitted | Infrared applications, industrial furnace parts, heaters |
The table summarizes the general intent of the grades; exact bubble classes, tolerances and transmission data sheets should be confirmed for the specific batch. [Batch Data Sheets Available On Request]
How to Choose
- Application sees deep UV or precision optics → JGS1.
- General optical, laboratory or sight-glass use → JGS2.
- High-temperature industrial service where optical clarity is secondary → JGS3.
JGS Grades and International Equivalents
JGS grades correspond broadly to the grade families used by international fused quartz producers (e.g. UV-grade, optical-grade, IR-grade tubing). We can cross-reference your current material specification to a JGS grade — send us the brand name or data sheet and we will match it.
Products Available in These Grades
- Quartz tubes — JGS2/JGS3 for furnace and process use
- Quartz plates — JGS1/JGS2 for optical and view ports
- Quartz windows — JGS1 for UV windows
