Definition
Low iron glass or low-iron glass, also known as extra clear glass, ultra clear glass, super clear glass, or super white glass. It is a type of high-clarity glass that is made from silica with very low iron content. This low level of iron removes the greenish-blue tint that can be seen especially on larger & thicker sizes of glass.
Manufacturers & Different Names
Saint Gobain
DIAMANT extra clear glass, low-iron glass
AGC
Clearvision ultra low-iron glass
Vitro former PPG
Starphire ultra-clear & Acuity low-iron glass
Guardian
UltraClear low-iron glass
Pilkington
Optiwhite low iron glass.
Jinjing Group
Ultra clear glass, UL TRANS solar ultra clear glass, ZHICHUN ultra clear glass
Features & Benefits
Aesthetics
High level color conformity suitable for big area unobstructed view.
Safety
Less than 120PPM iron content, very low spontaneous breakage rate.
High Transmittance
Over 91% visible light transmission, to reveal the real appearance of the things.
UV Filtration
Low iron glass has lower absorption in UV light compared with clear float glass.
Flexibility
3mm~25mm thickness, up to 3300mm*18000mm size.
Optical Parameters
| Thickness | Visible Light | Solar Light | ||
| (mm) | Transmittance | Reflectance | Transmittance | Reflectance |
| 3 | 91.5% | 8% | 91% | 8% |
| 3.2 | 91.5% | 8% | 91% | 8% |
| 4 | 91.4% | 8% | 91% | 8% |
| 5 | 91% | 8% | 90% | 8% |
| 6 | 91% | 8% | 90% | 8% |
| 8 | 91% | 8% | 89% | 8% |
| 10 | 91% | 8% | 89% | 8% |
| 12 | 91% | 8% | 88% | 8% |
| 15 | 90% | 8% | 87% | 8% |
| 19 | 90% | 8% | 86% | 8% |
| 22 | 89.6% | 8% | 85% | 8% |
| 25 | 89% | 8% | 84% | 8% |
| Thickness | U value | Sound Insulation | UV Penetration | |
| (mm) | （W/m2K) | Rm (dB) | Rw (dB) | |
| 3 | 5.8 | 26 | 30 | 76% |
| 3.2 | 5.8 | 26 | 30 | 75% |
| 4 | 5.8 | 27 | 30 | 73% |
| 5 | 5.8 | 29 | 32 | 71% |
| 6 | 5.7 | 29 | 32 | 70% |
| 8 | 5.7 | 31 | 34 | 68% |
| 10 | 5.6 | 33 | 36 | 66% |
| 12 | 5.5 | 34 | 37 | 64% |
| 15 | 5.5 | 35 | 38 | 61% |
| 19 | 5.5 | 37 | 40 | 59% |
| 22 | 5.5 | 38 | 43 | 58% |
| 25 | 5.5 | 39 | 45 | 56% |
Physical Parameters
| Elasticity Modulus | 73.1Gpa |
| Rupture Modulus(Tensile Strength-ultimate) | 41.4 Mpa |
| Knoop Hardness | 456kgf/mm2 |
| Density | 2.5076 g/cm3 |
| Linear Coefficient of Expansion 20-300 ℃ | 9.28×10-6/℃ |
| Linear Coefficient of Expansion 20-450 ℃ | 9.75×10-6/℃ |
| Transformation Temperature | 556℃ |
| Intenerate Temperature or Yield Point | 606℃ |
| Softening Point | 710℃ |
| Annealing Point | 547℃ |
| Strain Point | 513℃ |
| High Temperature Viscosity log2 | 1392℃ |
| High Temperature Viscosity log3 | 1152℃ |
| High Temperature Viscosity log4 | 996℃ |
| Liquid Phase Temperature | 1008℃ |
Deep Processing
Low iron glass can be processed to high-quality toughened glass, heat-strengthened glass, heat bend glass, glass mirror, online CVD coating, offline MSVD coating, painted glass, silk screen glass, digital printing glass, laminated glass, double glazing, etc.
Applications
Appliances
Aquarium
Backsplash
Balustrade
Curtain Wall
Doors
Furniture
Handrail
Matrix
Partition
Pool Fencing
Shelf
Shopfront
Showcase
Shower Door
Skylight
Stair-treads
Tabletop
Windows
