Which products are suitable for hot stamping (gold/silver), embossing, and UV coating processes? 4 process techniques
💡 💡 At a Glance
Comparison Guide for Application Scenarios of Three Label Processes: Hot Stamping Gold, Hot Stamping Silver, and Spot UV
Last week, a client in the emerging beauty cosmetics space asked me: "I've heard of hot stamping, silver foil stamping, embossing, and UV — which one is right for me?"
I said: "It depends on your product positioning + budget — each of the 4 processes has its own chemical principle."
He said, "Chemical principle?"
I said: "Hot foil stamping is thermal transfer of a metallic film, UV is UV-cured resin, embossing is pressing with a metal die — 3 entirely different chemical reactions. This article won't cover 'how the processes are printed' — it explains the chemical principles + suitable products for all 4 processes."
4 Process Chemical Principles
Process 1: Hot Stamping (Foil Stamping)
Chemical Principle:
Metallic aluminum film
+ Hot-melt adhesive layer
+ Substrate (paper / film)
↓
High temperature 110-130℃ + Pressure 2-4 kg/cm² + Time 0.5-2 seconds
↓
Hot-melt adhesive melts + Metal film transfers to substrate
↓
After cooling, metal film permanently bonds with substrate
Materials:
- Metal film — aluminum foil + dyed layer (gold / silver / red / blue)
- Hot-melt adhesive — EVA / polyurethane
- Substrate — coated paper / PET / matte silver paper
Visual Effect: metallic reflection, three-dimensional, textured
Typical Applications: LOGO, borders, key text
Process 2: Silver Stamping
Chemical Principle: Same as hot stamping, but the metal film uses pure silver aluminum foil (without dyed layer).
Visual Effect: pure silver reflection, cool, minimalist
Typical Applications: electronics / beauty / industrial products
Process 3: Embossing
Physical Principle:
Metal male die (positive mold) + Metal female die (negative mold) + Substrate (paper / gray board) ↓ High pressure 20-50 kg/cm² + Time 1-3 seconds ↓ Substrate deforms → forms 3D raised/recessed pattern ↓ Three-dimensional effect retained after cooling
Materials:
- Male die + female die — copper / zinc plate (engraved)
- Substrate — paper above 200g (thin paper cannot be embossed)
Visual Effect: 3D three-dimensional, tactile, layered
Typical Applications: LOGO, decorative patterns, high-end gift boxes
Process 4: UV (Spot UV)
Chemical Principle:
UV resin (photosensitive liquid) + Substrate ↓ UV lamp irradiation 5-10 seconds ↓ Resin photopolymerization reaction (molecular chain crosslinking) ↓ Cures to form a hard glossy layer
Materials:
- UV resin — acrylate + photoinitiator
- Substrate — coated paper / PET
Visual Effect: local gloss, three-dimensional (but no tactile feel)
Typical Applications: LOGO accents, text, decorative patterns
Visual Comparison of 4 Processes
| Process | Visual | Touch | Applicable Scenarios |
|---|---|---|---|
| Hot Stamping (Gold) | Gold reflective | Flat (no texture) | Gift Boxes / Chinese-style Products |
| Hot Stamping (Silver) | Silver reflective | Flat (no texture) | Beauty / Electronics |
| Embossing | Three-dimensional | 3D texture | Premium Gift Boxes / LOGO |
| UV | Spot gloss | Slightly raised | LOGO / Decoration |
4 Process Cost Comparison
| Process | Additional Cost per Set | Additional Cost for 5,000 Sheets |
|---|---|---|
| Hot Stamping (Gold) | +0.3 RMB | +1500 RMB |
| Hot Stamping (Silver) | +0.3 RMB | +1500 RMB |
| Embossing | +0.5 RMB | +2500 RMB |
| UV | +0.3 RMB | +1500 RMB |
Product Type × Recommended Process
Product 1: Cosmetic Bottle Label
Recommended: Matte Lamination + Silver Foil Stamping + UV (3 processes)
Reason: Cosmetics lean toward a beauty aesthetic; silver + UV partial gloss is the best fit.
Cost: +1 RMB/sheet
Product 2: Baijiu Gift Box Label
Recommended: Matte Lamination + Gold Foil Stamping + Embossing (3 processes)
Reason: Baijiu conveys a traditional feel; gold + embossing creates a 3D stereo effect.
Cost: +1.1 RMB/sheet
Product 3: Electronic Product Label
Recommended: Matte Lamination + Silver Foil Stamping (2 processes)
Reason: Electronic products convey a tech feel; silver is clean and simple.
Cost: +0.6 RMB/sheet
Product 4: Food Label
Recommended: Matte Lamination + Gold Foil Stamping (2 processes)
Reason: Food calls for an approachable feel; gold adds warmth.
Cost: +0.6 RMB/sheet
Product 5: Premium Gift Box Label
Recommended: Matte Lamination + Gold Foil Stamping + UV + Embossing (4 processes)
Reason: Premium gift boxes have the strongest sense of ceremony, achieved through 4 stacked processes.
Cost: +1.4 RMB/sheet
Product 6: Industrial Identification Label
Recommended: Silver Foil Stamping (1 process)
Reason: Industrial identification requires clarity + corrosion resistance.
Cost: +0.3 RMB/sheet
Process Stacking: 3 Recommended Tiers
| Tier | Combination | Additional Cost per 5,000 Sheets | Best For |
|---|---|---|---|
| Basic | Matte Lamination + Hot Foil Stamping | +RMB 3,000 | FMCG / Mid-Range |
| Mid-Range | Matte Lamination + Hot Foil Stamping + UV | +RMB 4,500 | Mid-to-High-End |
| Premium | Matte Lamination + Hot Foil Stamping + UV + Embossing | +RMB 7,000 | High-End Gift Boxes |
Not recommended to exceed 4 processes (visual clutter + wasted cost).
To learn more about lamination processes — see: What is the difference between glossy and matte lamination for labels?, or contact a LeXiang Packaging consultant directly — you'll receive a process plan and quotation within 24 hours.
FAQ
What is the difference between gold foil stamping and silver foil stamping on labels?
3 differences: (1) Metal film—gold foil uses gold-colored aluminum film (brass tone), silver foil uses silver aluminum film (pure silver); (2) Visual—gold foil gives a warm feel (weddings, gift boxes), silver foil gives a tech/modern feel (electronics, cosmetics); (3) Cost—gold foil +0.3 RMB/sheet, silver foil +0.3 RMB/sheet (basically the same). Gold foil suits traditional gift boxes / wine / Chinese-style products; silver foil suits modern cosmetics / electronics / industrial products.
What is the difference between embossing and UV coating processes on labels?
3 differences: (1) Principle—embossing uses a metal die to press a raised shape (3D tactile effect), UV uses a UV lamp to cure UV resin (localized gloss); (2) Visual—embossing produces tactile 3D, UV produces glossy 3D; (3) Application—embossing suits LOGO + borders, UV suits small local patterns (e.g., LOGO + text + decorations). Embossing +0.5 RMB/sheet, UV +0.3 RMB/sheet.
Does the gold foil stamping on labels fade?
Yes, under 3 conditions: (1) Friction—repeated rubbing will rub off the gold (recommend adding matte lamination for protection); (2) Chemical solvents—contact with alcohol / oil will remove the gold (recommend choosing chemical-resistant metal film); (3) UV light—long-term sun exposure will oxidize and discolor it (recommend adding a UV varnish protective layer). All 3 conditions combined = fading starts at 6 months. Improvement strategy: gold foil + matte lamination + restrict scenarios (avoid light and oil).
How many label processes is appropriate to combine?
3 tiers of combinations recommended: (1) Basic tier—matte lamination + gold foil (2 processes, 5000 sheets total +0.6 RMB/sheet); (2) Mid tier—matte lamination + gold foil + UV (3 processes, 5000 sheets total +1 RMB/sheet); (3) Premium tier—matte lamination + gold foil + UV + embossing (4 processes, 5000 sheets total +1.5 RMB/sheet). Not recommended to exceed 4 processes (visual clutter + wasted cost). Each additional process +0.3-0.5 RMB/sheet.
How to control the temperature for gold foil stamping on labels?
3 temperature parameters: (1) Temperature—110-130°C (metal film melting temperature); (2) Pressure—2-4 kg/cm² (ensure film bonds with substrate); (3) Time—0.5-2 seconds (speed). The 3 parameters must match: high temperature + short time / low temperature + long time. Simple on-site test at the printing factory: check whether the foil surface is smooth and free of bubbles; no bubbles = OK.
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