Stainless Steel Mirror Sheet
Stainless steel mirror sheet (also called No. 8 finish or 8K mirror finish) is a highly reflective, non-directional polished steel sheet. The mirror surface is created through progressively finer mechanical polishing or chemical wet polishing. This is followed by buffing with rouge compound to remove all directional lines. The result is a specular, near-glass surface with reflectivity comparable to an actual mirror. Surface roughness on a true No. 8 finish falls below Ra 0.2 microns. Each sheet ships with PE protective film to prevent surface damage during transportation and handling.
Stainlessinox LLP manufactures and supplies mirror finish stainless steel sheets from our facility in Khopoli, near Mumbai. Our main office is in Lower Parel. With over 3 decades of experience in stainless steel and ISO certification, we stock one of India's largest decorative stainless steel inventories. We supply architects, interior designers, elevator manufacturers, signage manufacturers, food and pharmaceutical equipment manufacturers, retail fit-out contractors, and hospitality developers throughout India for facade cladding, elevator cabins, food processing equipment, signage, and furniture projects.
Mirror polished stainless steel sheets come in thickness from 0.3 mm to 6.0 mm and standard widths of 1000 mm, 1219 mm, 1250 mm, and 1524 mm, with custom cut-to-size on request. Standard sheet sizes include 4x8 ft (1219x2438 mm), 4x10 ft (1219x3048 mm), and 5x10 ft (1524x3048 mm). Finish options span 6K semi-mirror, 8K standard mirror, 10K super mirror, and BA (Bright Annealed) mirror. PVD colour coating and anti-fingerprint treatment can be applied over any mirror base.
This page includes specifications, types, industrial applications, and frequently asked questions for stainless steel mirror sheets.
Color Choice
Stainless Steel Mirror Sheet
Specifications
The table below lists the specifications for our stainless steel mirror sheet range, including thickness, sizes, finish grades, and surface options.
| Parameter | Value |
|---|---|
| Grade | AISI 201, 304, 304L, 316, 316L, 430 |
| Thickness | 0.3 mm to 6.0 mm (24 GA to 3/16 in) |
| Width | 750 mm, 914 mm, 1000 mm, 1219 mm (4 ft), 1250 mm, 1500 mm, 1524 mm (5 ft) |
| Length | Up to 6000 mm; standard: 2438 mm (8 ft), 3048 mm (10 ft) |
| Standard Sheet Sizes | 4x8 ft (1219x2438 mm), 4x10 ft (1219x3048 mm), 5x10 ft (1524x3048 mm) |
| Finish | No. 8 Mirror (#8), 6K, 8K, 10K, Super Mirror, BA Mirror (Bright Annealed) |
| Form | Cold Rolled Sheet |
| Surface | Single-side mirror polish (standard); double-side mirror polish (on request) |
| Protective Film | PE film, Laser PE film, Optic Fibre Laser PE film |
| Edge | Mill Edge, Slit Edge |
Stainless Steel Mirror Sheet Types
Mirror finish stainless steel sheet is available in many reflectivity grades: 6K (semi-mirror), 8K (standard mirror, equivalent to No. 8 per ASTM A480), 10K (super mirror), and BA mirror (Bright Annealed). PVD colour coating and anti-fingerprint treatment can be applied over any mirror base. This section covers each mirror finish grade and the surface coating options.
Mirror Finish Grades (6K, 8K, 10K, Super Mirror)
The mirror finish grade decides reflectivity level and surface quality. Each grade is produced through a different depth of mechanical polishing. The number (6K, 8K, 10K) indicates the level of the final polish stage.
| Finish Grade | Description | Reflectivity |
|---|---|---|
| 6K | Semi-mirror finish with moderate reflectivity; faint polishing lines may be visible | Medium |
| 8K (No. 8 per ASTM A480) | Standard mirror finish; non-directional, high-gloss, reflective surface | High |
| 10K | Super mirror finish; finer polish with fewer surface imperfections | Very High |
| Super Mirror (12K+) | Ultra-high reflectivity; produced through extended polishing stages for blemish-free clarity | Highest |
| BA Mirror | Bright Annealed finish (EN 10088 designation: 2R); near-mirror reflectivity achieved through annealing in an oxygen-free atmosphere after cold rolling | High |
How Mirror Finishes Are Produced
8K mirror finish is the standard choice for stainless steel mirror sheet. It is made by polishing with progressively finer abrasives, followed by buffing with rouge compound to remove all directional lines. The result is a non-directional, specular surface. 10K and 12K super mirror finishes go further, with additional polishing stages that bring surface roughness below Ra 0.05 microns.
Two production methods exist for No. 8 mirror finish. Dry polishing can only reach a No. 7 finish, which still shows faint directional lines. Wet polishing (chemical polishing) produces a true No. 8 non-directional mirror surface that is transparent, cleaner at the microscopic level, and more resistant to bacterial adhesion. We use wet polishing at our Khopoli facility to achieve consistent 8K and 10K results.
BA mirror finish takes a different route. The sheet is cold rolled using polished rolls and then annealed in an inert gas atmosphere. This process creates a reflective surface without mechanical polishing, though the reflectivity doesn't match a true 8K finish.
PVD Coloured & Anti-Fingerprint Mirror Sheet
PVD colour coating can be applied over any mirror base to produce coloured stainless steel mirror sheet in gold, rose gold, black, bronze, champagne gold, sapphire blue, silver, and green. The PVD layer is 1 to 2 microns thick, harder than electroplated coatings, and won't fade over time. Anti-fingerprint treatment can be added on top of either uncoated or PVD-coated mirror surfaces.
Stainless Steel Mirror Sheet Industrial Applications
Below are 4 primary application areas of stainless steel mirror sheet: architecture and interior design, elevator and escalator cladding, food and beverage equipment, and automotive and signage.
Stainless Steel Mirror Sheet FAQ
Common questions about our stainless steel mirror sheet answered by our technical team.
No. 8 mirror finish (also called #8 or 8K finish) is the highest standard reflective polish on stainless steel sheet per ASTM A480. It is produced by progressively finer mechanical polishing or chemical wet polishing to achieve a non-directional, highly reflective surface. Surface roughness on a No. 8 finish is typically below Ra 0.2 microns.
Mirror finish stainless steel sheet comes in thicknesses from 0.3 mm to 6.0 mm. Common gauges are 24 GA (0.6 mm), 22 GA (0.8 mm), 20 GA (0.9 mm), 18 GA (1.2 mm), 16 GA (1.5 mm), and 14 GA (1.9 mm). Thinner gauges suit wall cladding and elevator panels. Thicker sheets at 3.0 mm and above are used for countertops, heavy-duty signage, and structural decorative panels.
6K is a semi-mirror finish with moderate reflectivity where faint polishing lines may still be visible. 8K (equivalent to No. 8 per ASTM A480) is the standard mirror finish with high, non-directional reflectivity. 10K is a super mirror finish with enhanced clarity achieved through additional polishing stages. The higher the number, the finer the surface and the greater the reflectivity.
No. 8 mirror finish is produced through progressively finer mechanical polishing followed by buffing with rouge compound. Wet polishing (chemical polishing) produces a true non-directional mirror surface that is cleaner at the microscopic level and more resistant to bacterial adhesion than dry-polished alternatives.
Yes. We offer mirror polished stainless steel cut to size from our facility in Khopoli. Standard sheet sizes include 4x8 ft (1219x2438 mm), 4x10 ft (1219x3048 mm), and 5x10 ft (1524x3048 mm). Custom dimensions are available on request above minimum order quantity, with a cut-to-size tolerance of +/-1/16 in (+/-1.5 mm).
Single-side mirror polish is the standard for most architectural and decorative applications. Double-side mirror polish (both sides polished to No. 8 finish) is available on request. Signage panels, decorative screens, and art installations use double-side mirror stainless steel sheet.
Stainless steel mirror sheet price changes with base material, thickness, mirror finish quality (6K, 8K, 10K, or Super Mirror), sheet dimensions, and order quantity. Single-side versus double-side polish and PE film type also affect the final cost. Contact us for current pricing based on your specific requirements.
Yes. Mirror finish stainless steel sheet suits outdoor applications. Higher chloride-resistant variants are recommended for coastal or high-humidity locations due to their superior resistance to atmospheric corrosion. Regular cleaning with mild detergent and water extends the outdoor service life of the reflective surface.