MIROGARD®
Specifications
All types of MIROGARD® glass offer superior levels of anti-reflection, transmittance, color rendering and UV protection in a range of thicknesses. Each MIROGARD® variant is suited for a specific requirement, so discover which one is right for you using the details below.
| Ordinary Glass (Float Glass) | MIROGARD® | MIROGARD®plus | MIROGARD®protect | MIROGARD®Protect Ultra | MIROGARD®DARO | |
|---|---|---|---|---|---|---|
| Reflectance ρvA % | ~ 8% | ~ 0.9% | ~ 1.1% | ~ 0.9% | ~ 0.9% | < 1% |
| Transmittance τvA % | ~ 91% | ~ 99% | ~ 98% | ~ 98% | ~ 98% | ~ 98% |
| Perceived color rendering |
98 | 100 | 98 | 99 | 100 | 100 |
| Mechanical protection effect | low | low | low | medium to high |
medium to high |
low to high |
| Splinter protection | ✗ | ✗ | ✗ | ✓ | ✓ | possible |
| Reduced visibility of fingerprints | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ |
| UV Protection (300 nm – 380 nm) |
~ 44% | ~ 48% | ~ 82% | ~ 99% | ~ 99% | min 48% max 99% * |
| Glass thickness | 2 mm - 8 mm | 2 mm | 2 mm | 4.4 mm | 2.95 mm | min 2.0 mm |
| 3 mm | 3 mm | 6.4 mm | ||||
| 4 mm | 4 mm | 8.4 mm | ||||
| Available sizes in mm x mm | 1,000 x 1,600 | 1,000 x 1,600 | ||||
| 1,220 x 1,770 | 1,220 x 1,770 | 1,220 x 1,770 | 1,220 x 1,770 | |||
| 1,220 x 885 | 1,220 x 885 | 1,220 x 885 | 1,220 x 885 | 1,220 x 885 | ||
| 3,180 x 1,770 | 3,180 x 1,770 | 3,180 x 1,770 |
* UV protection value depends on MIROGARD® version that is coated with DARO.
Anti-Reflective Properties
MIROGARD® anti-reflective glass is a float glass with optical interference properties coated on one or both sides to minimize surface reflections. A special immersion procedure is used to apply multiple metal oxide layers just nanometers thick. Reflections are reduced optically by up to 90% and the glass appears invisible. At a transmission of >98%, viewers can then focus on what’s important.
Advantages of SCHOTT MIROGARD®
- Luminous reflectance of 0.9 %
- Appears invisible
- Neutral in color
- High transmission
- Color rendering index of Ra = 100, delivering a clear view of the art
Float vs anti-reflective glass
Conventional float glass has dependable but limited optical properties. At just 91% transmission, a significant amount of light is lost. The smaller share of this (approximately 1 %) is absorbed by the glass itself. The other 8 % is reflected by the glass surface. This reflection is perceived as highly inconvenient, especially in applications which require clear viewing. Surface finishing can help here.
Disadvantages of float glass
- Luminous reflectance of 8 %
- Undesirable reflections
- Lower transmission
- Colors appear drab
- Displays art with unsophisticated colors
 Float Glass |
 SCHOTT MIROGARD® |
| - 1% luminous reflectance of SCHOTT MIROGARD® compared to 8% luminous reflectance of regular glass. | |
Tests and Cleaning
SCHOTT invests a great deal of time and effort to ensure that art lovers around the world have an uninterrupted view of their favorite pieces. The result is a high-tech, anti-reflective art glass of the highest quality with a surface that is extremely stable, easy to clean and highly resistant to abrasion.
Benefits of SCHOTT dip-coated glass
- Burned-in surface coating
- Highly resistant to abrasion
- Extremely stable
MIROGARD® is also mechanically robust and highly resistant to chemicals, delivering durable performance in every application. Key properties include:
- High mechanical durability proven by international standards
- Easy handling and processing
- Robust surface for daily cleaning cycles
Testing
MIROGARD® undergoes a series of rigorous tests, split into mechanical and chemical:
Mechanical tests
- Tesa Test, which highlights the durability against the forces of adhesive tape being ripped from the coating.
- Taber Abrasion Test
Testing the abrasion resistance of coating with the Taber Abrasion Process
- Pencil Hardness Test. Here MIROGARD®achieved class 9H, a significantly higher score than other anti-reflective surfaces.
Pencil Hardness Test to check scratch resistance
- Cheesecloth Test.
Cheesecloth test shows the good resistance of the coating
The Cheesecloth Test is an indicator of the good resistance of the coating. It’s based on DIN ISO 9211-4 and simulates moderate abrasion. In this test, a cushion of gauze is pressed onto a coated surface with a certain force and then moved several times. The surface is then checked for damage. Competing products are 95 % worse than SCHOTT products in this test.
Chemical tests
- Standardized CASS (Copper-accelerated Acid Salt Spray) test
- NSS (Neutral Salt Spray) test, which examines the anti-corrosive coating
MIROGARD® DARO
The difference between anti-reflective picture glazing and MIROGARD® DARO can be seen immediately. This durable, anti-reflective coating with oleophobic properties, is one of the best products on the market for eliminating fingerprints and smudges on picture glazing.
| Specifications MIROGARD®DARO: | |
|---|---|
| Glass thickness | 2 – 4 mm |
| Available sizes | 990 x 1,770 mm |
| Luminous reflectance | < 1% |
| Light transmission | ~ 98% |
| Color rendering index | Ra= 100 |
| Combination with other properties possible | |
Fingerprint-free
Fingerprints have a crucial impact on the optical properties of an anti-reflective coating and are much more visible than on uncoated glass. MIROGARD® DARO eliminates these fingerprints using a combination of oleophobic and hydrophobic properties, reducing their visibility down to 10 %.
Easy to clean
The DARO coating is a proprietary blend of hydrophobic and oleophobic molecules that are optimized to bond with the nano-features of SCHOTT´s anti-reflective coating. Oleophobic and hydrophobic surfaces (initial water contact angle > 110°) don't allow grease and sweat from fingers to stick to the glass and any remaining residues can be removed very easily by dry wiping.
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Equally applied imprint on MIROGARD® DARO and anti-reflective glass (both glasses wiped dry three times)
