Stainless Steel Decorative Sheet Surface Finishes & Processing Technologies

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Common Base Finishes: 2B Finish & BA Finish

The two most widely used base surfaces for decorative stainless steel sheets are 2B finish and BA finish, with the core difference lying in the annealing process.

  • 2B Finish

    Produced through annealing and pickling. The surface has a mild oxide layer, presenting a matte, slightly dark metallic luster. It is the most common standard base finish for further processing.

  • BA Finish (Bright Annealed)

    Produced via bright annealing without oxidation. The surface is clean, bright, and highly reflective, serving as an premium base for mirror polishing, plating, and other advanced treatments.

key words:Stainless Steel Decorative Sheets, 2B Finish, BA Finish, 8K Mirror Stainless Steel, Brushed Stainless Steel, Etched Stainless Steel, Vacuum Plated Stainless Steel, Antique Copper Stainless Steel, Fingerprint-Resistant Stainless Steel, Embossed Stainless Steel, Wood Grain Stainless Steel

Main Stainless Steel Decorative Processing Technologies

① Mirror Finish (8K Polishing)

Mirror finishing is a polishing process that creates a highly reflective, mirror-like surface on stainless steel, which can be further processed with titanium coating, etching, etc.

Professional term: 8K finish

Grades: 6K, 8K, Precision 8K, Ultra-Precision 8K

Differences: Distinguished by surface brightness and control of polishing marks.

Specifications

  • Machine-polished 8K: Thickness 0.3–3.0 mm, length 1.6 m to 4.5 m.
  • Manual-polished 8K: Required for sheets over 3.0 mm thick (to avoid breaking the polishing glass pad), with customizable length.

Production Process

Deburring → Sheet loading → Coarse grinding → Fine grinding → Cleaning → Drying → Film lamination
  • Coarse grinding: Uses sandpaper, determines brightness.
  • Fine grinding: Uses felt pad, controls polishing marks.

Quality Inspection Standard

No insufficient brightness, polishing marks, dents, scratches, stains, or uneven lamination.

② Brushed Finish (Satin Finish)

Also known as abrasive finishing. Uses a high-speed rotating abrasive belt to grind the sheet surface, forming regular linear textures.

Common Grit Types

  • Standard grit, snowflake grit (NO.4), straight brushed,
  • Combinations: snowflake + standard, snowflake + brushed, standard + brushed, etc.

Note: Higher abrasive belt number = finer texture; lower number = coarser texture. Standard: 320# belt.

Snowflake Grit (NO.4): Intermittent texture, made with 400# belt.

Applicable Specifications

Base sheets: 2B, BA, mirror finish

Thickness: 0.4–3.0 mm

Width: 1000 mm, 1219 mm, 1500 mm (customizable)

Production Process

Belt replacement → Deburring → Lubrication → Brushing → Degreasing → Cleaning → Drying → Film lamination
Pre-processing notes: No chalk marks, sweat, or fingerprints on the surface.

Quality Inspection Standard

Uniform texture, no fingerprints, scratches, marks, horse-shoe prints, nail marks, or uneven lamination.

③ Etching Finish

Uses ink to print patterns on the stainless steel surface, then etches unprotected areas with chemical solution to create designed textures.

Three Etching Types

  1. Photosensitive Etching

    Uses film exposure for patterning. Suitable for custom sizes, small batches, or deep etching. Etching depth over 20μm must use this method. Max depth: 50μm.

  2. Screen Printing Etching

    Uses stencil and ink for patterning. Suitable for standard sizes, mass production. Etching depth: 3–15μm.

  3. Titanium-Stripping Etching

    No depth; oxidizes partial colored coating to reveal patterns.

Production Process

Patterning (ink application) → Exposure → Sheet loading → Etching → Ink removal → Cleaning → Drying → Film lamination
Recommendation: Use 304 grade stainless steel. 201 has low nickel content, which causes blackening and damage during etching.

Quality Inspection Standard

No acid spots, edge damage, or residual ink. Deeper etching = higher difficulty and cost.

④ Vacuum Ion Plating

Uses target ionization in a vacuum furnace, reacting with oxygen, nitrogen, or acetylene to form a durable colored metal film on the surface.

Improves corrosion resistance, hardness, wear resistance, conductivity, heat resistance, and appearance.

Available Colors

Titanium gold, rose gold, rose red, antique bronze, black titanium, sapphire blue, emerald green, pink, champagne gold, coffee gold, violet.

Applicable Specifications

Base sheets: Mirror, brushed, etched, sandblasted, disturbed, composite finish

Thickness: 0.3–3.0 mm

Width: 1000 mm, 1219 mm, 1500 mm (custom length)

Production Process

Deburring → Drilling → Cleaning → Loading → Vacuum furnace plating → Unloading → Film lamination

Quality Inspection Standard

Uniform color, no color difference, yin-yang surface, fingerprints, sweat marks, or scratches.

⑤ Wet Black Titanium Plating

Immerses stainless steel in a chemical plating bath to create a deep black finish through chemical reaction.

Darker than vacuum plating; 90% color consistency controllable.

Causes of color difference: Chemical solution quality & sheet material.

Production Process

Deburring → Drilling → Cleaning → Chemical bath plating → Rinsing → Drying → Film lamination

Quality Inspection Standard

Same as vacuum plating: uniform color, no defects.

⑥ Wet Copper Plating (Antique Copper)

Coats stainless steel with a copper layer in a chemical bath to achieve an antique copper appearance.

Pre-processing: No fingerprints, damage, or sweat.

Post-processing: Must be oil-coated to prevent oxidation.

Production Process

Standard brushing → High-temperature degreasing → Nickel plating (improves adhesion) → Copper plating → Gun black plating → Cleaning → Drying → Finish sanding → Oil coating → Film lamination

Quality Inspection Standard

No impurities, bubbles, scratches, or indentations.

⑦ Sandblasting Finish

Uses compressed air to blast abrasive particles at high speed onto the sheet surface, creating a uniform sand-like texture.
Pre-processing: No fingerprints, oil, or sweat (permanent defects if present).

Production Process

Abrasive replacement → Sheet loading → Surface cleaning → Sandblasting → Blowing off residual sand → Film lamination

Quality Inspection Standard

Uniform blasting, no yin-yang surface, fingerprints, or oil stains.

⑧ Disturbed Finish (Ornamental / Vibration Finish)

Uses a high-speed rotating abrasive belt to perform circular grinding, creating a random circular texture on the surface.

⑨ Laminated & Heat Transfer Printing (Wood Grain Stainless Steel)

Commonly known as wood grain sheets.
  • Laminated Finish: Applies adhesive and bonds protective film onto the sheet under high pressure and temperature. May crack during bending.
  • Heat Transfer Printing: Uses high-temperature pressure to bond transfer paper. More flexible, less likely to crack during bending.

Applicable Specifications

Base sheet: Brushed finish

Thickness: 0.4–3.0 mm

Max width: 1219 mm (4 ft); wider sheets require splicing.

Length: Customizable.

Production Process

  • Laminating: Brushing → Sheet loading → Press bonding → Film lamination
  • Heat transfer: Brushing → Priming → Powder spraying → Pattern printing → Coating → Fingerprint-resistant treatment

Quality Inspection Standard

Flat surface, full coverage, even lamination.

⑩ Laser CD Pattern Finish

Also called CD grain sheet. Uses precision machinery to grind smooth, touch-free patterns (CD shape, linear, brick, etc.).

Applicable Specifications

Base sheet: Mirror finish

Thickness: 0.4–3.0 mm

Max width: 1500 mm

Max length: 6000 mm (customizable)

Production Process

Base polishing → Sheet loading → Laser grinding → Film lamination

Quality Inspection Standard

Uniform pattern, no yin-yang surface, scratches, or fingerprints.

⑪ Fingerprint-Resistant (Anti-Fingerprint) Coating

A final protective process applied after all other finishes.

Sprays or rolls transparent nano-oil onto the surface, which cures into a protective layer after heating.

Not recommended for mirror finish: Causes cloudy haze and small bubbles, reducing reflectivity.

Types

Glossy, semi-matte, matte (adjustable gloss level).

Not suitable for high-temperature environments (coating melts when heated).

Applicable Specifications

Base sheets: Brushed, etched, embossed

Thickness: 0.4–3.0 mm

Width: 1000 mm, 1219 mm, 1500 mm (custom length)

Production Process

Color matching → Sheet loading → Cleaning → Coating → Baking → Film lamination

Quality Inspection Standard

No bubbles, uneven coating, or under-cured oil.

⑫ Embossed Finish

Typically produced by roll embossing on stainless steel coils. Uses engraved rollers to press 3D patterns into the coil.

Similar appearance to etching, but with smoother edges and lower unit cost. Mold cost is high and patterns are limited.

Common product: 6K + embossed finish.

Applicable Specifications

Coil thickness: 0.4–1.2 mm (some suppliers process over 1.2 mm)

Width: 1000 mm, 1219 mm

Production Process

Coil 6K polishing → Roll embossing → Slitting → Cut-to-length → Finished sheet

Quality Inspection Standard

No obvious roller marks, scratches, or creases.

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