Want to add a metallic shine to your packaging?
No problem.
In this post, I’ll break down metallized show-through, foil stamping, and metallic ink,
3 popular ways to create metallic effects on flexible packaging,
Along with their pros and cons.
Quick Comparison Chart
Real-World Showcase
Metallic Show Through
What is Metallic Show Through
Metallic show through is the most common way to achieve metallic effects on flexible packaging.
It works by printing directly on metallic films such as metallized film and aluminum foil without white underprinting.
Since the ink is translucent it reflects the metallic shine underneath creating a bright metallic finish.
Pros
1. Lowest customization cost
When the pouch uses metallic film you can get metallic effects in selected areas or the whole surface by leaving those parts without white underprinting.
2. No size limits
The metallic effect can appear anywhere the metallic film is applied.
3. Diverse metallic effects
By using holographic film iridescent film and other special films you can create unique holographic metallic or iridescent metallic looks.
4. Wide printing compatibility
Suitable for both rotogravure printing and digital printing.
Cons
1. Material limitation
This method cannot be used if the pouch does not contain metallic film, including metallized film and aluminum foil.
2. Finish limitation
Matte patterns weaken the metallic effect because matte ink does not reflect enough light from the metallic film.
The best way to achieve matte metallic finish is to use metallic ink.
3. Metallic Effect limitation
The metallic appearance lacks richness and cannot deliver a strong, premium metallic feel.
The gloss is also uniform across the metallized areas, making it difficult to create controlled highlights or contrast.
Foil Stamping
What is Foil Stamping?
Foil stamping uses a heated die to transfer foil of a specific shape onto packaging film to create a localized metallic effect.
Pros
1. Strongest metallic effect
Foil stamping provides the strongest metallic finish among the 3 methods as it reflects shine directly from the foil.
2. Premium tactile feel
Foil-stamped elements have a subtle embossed texture you can feel, making this effect unique among the three methods.
3. Wide range of colors
Foil stamping offers a broad selection of colors and finishes.
4. Wide printing compatibility
It can be used with both rotogravure and digital printing.
Cons
1. Higher cost
Foil stamping requires custom heated dies based on the design and adds an extra stamping process so the cost is higher than the other two methods.
2. Environmental limitations
Although the foil adheres well to the film, heavy abrasion can still damage the stamped design.
Prolonged exposure to high temperatures or direct sunlight may also cause discoloration of the foil.
3. Size limitation
The pattern is restricted by the size of the heated die so it is not suitable for large scale packaging designs.
4. Limited for intricate details
Foil stamping may struggle to accurately reproduce very fine or complex designs. Lines smaller than 1 mm may break or become incomplete.
Metallic Ink
Metallic ink achieves metallic shine by adding metal powder into the printing ink.
Pros
1. Flexible patterns
Metallic ink can print complex and delicate designs and allows precise color control.
2. No size limitation
Compared with foil stamping it is not restricted by heated dies and supports any pattern size.
3. Flexible metallic effect
It performs well in both glossy and matte finishes with moderate shine.
Cons
1. Printing limitation
Metallic ink is only available for rotogravure printing and cannot be used in digital printing.
2. Relatively high cost
The high price of metallic ink increases the overall cost of the pouch.
3. Environmental limitations
Due to metal powder in the ink long term exposure to high temperature or direct sunlight may cause aging and discoloration.
Conclusion
Above is s the comparison of the three metallic finishing effects.
Pouching provides professional and flexible metallic effect solutions for custom flexible packaging.
If you want to add a metallic shine to your packaging, feel free to contact us.
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