Project Overview

This case study presents a premium antique gold hard enamel pin developed by HIPINS, featuring the original character Maelstrom. Designed as a large-format, collectible pin, this project combines character illustration with a heraldic shield structure, resulting in a bold, narrative-driven enamel pin with strong visual weight and craftsmanship value.

The pin adopts a pin-on-pin construction, integrating hard enamel coloring, UV printing, translucent enamel effects, and laser engraving. Every technical decision was made to support durability, depth, and a refined antique aesthetic suitable for limited-edition releases.

Character Concept: Maelstrom

Maelstrom is depicted as a commanding figure at the helm, symbolizing control, resilience, and movement against turbulent forces. His posture, facial expression, and the steering wheel motif all reinforce a sense of leadership in chaos, making the character instantly recognizable and emotionally engaging.

Rather than isolating the character, the design embeds Maelstrom within a shield-shaped crest. This approach enhances the storytelling by framing the character as both a protector and a central emblem, aligning well with collectible pin culture and fantasy-inspired visual language.

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Overall Structure and Pin-on-Pin Design

The Maelstrom pin uses a two-layer pin-on-pin structure, which significantly enhances depth and hierarchy.

Top Layer – Character Component
The upper layer focuses on Maelstrom himself and is produced using hard enamel with raised metal lines. Skin tones, clothing, and mechanical elements are filled with carefully matched enamel colors, ensuring a smooth, polished surface.

The antique gold metal outlines give the character a classic, time-worn feel while maintaining sharp definition. Select areas incorporate translucent enamel to subtly soften shadows without reducing contrast.

Bottom Layer – Shield Base
The bottom layer is a shield-shaped base measuring approximately 110.2 mm, providing both visual balance and structural support. It features:

• Antique gold plated raised borders
• UV-printed storm textures beneath translucent enamel
• Sandblasted recessed metal areas for matte contrast

This layered construction allows Maelstrom to visually stand forward from the background, creating a strong three-dimensional presence.

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Hard Enamel and Color Execution

This project exclusively uses hard enamel, chosen for its durability, smooth finish, and premium tactile feel. Unlike soft enamel, hard enamel creates a flat surface where metal lines and colors sit nearly on the same plane, ideal for large, high-end pins.

To support the complex artwork, HIPINS combined:

• Solid hard enamel fills for main color blocks
• UV printing for gradient storm effects and fine background details
• Translucent hard enamel to enhance depth without obscuring printed textures

This hybrid approach ensures the pin remains visually rich while retaining the long-term durability expected from hard enamel products.

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Antique Gold Plating and Surface Treatment

The entire pin is finished with antique gold plating, a key defining feature of this project. Unlike bright gold, antique gold offers:

• Softer reflections
• Enhanced contrast with dark enamel colors
• A vintage, collectible appearance

The plating is paired with selective polishing on raised edges and sandblasting in recessed areas, creating a balanced interplay between shine and texture. This treatment emphasizes the sculpted lines without overpowering the artwork.

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Backside Design and Laser Engraving

The back of the Maelstrom pin is thoughtfully designed to match the quality of the front. It features:

• Antique gold plated metal surface
• Subtle decorative star patterns
• Laser engraving indicating the limited edition, marked as “LE 40 XX/40”

Laser engraving ensures permanence and precision, reinforcing the exclusivity of the piece and making each pin clearly identifiable within the limited run.

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Attachments and Packaging

Given the pin’s size and layered construction, secure attachments are essential. This project uses rubber clutches, selected for their strong grip and wearer comfort.

Each pin is individually packed using:

• PVC bags
• Bubble bag protection

This packaging method protects both the enamel surface and metal plating during storage and transportation.

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Production Challenges and HIPINS Solutions

One of the main challenges was adapting the highly detailed illustration into a hard enamel format without losing expression or clarity. HIPINS refined metal line thickness and adjusted color zones to ensure clean enamel filling and long-term durability.

Another challenge involved precise alignment between the top and bottom layers. Tight mold tolerances and multi-stage quality control checks ensured consistent positioning across the entire production batch.

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Client Feedback

“Our client said: ‘The antique gold finish and hard enamel surface give Maelstrom a truly collectible feel. The pin feels solid, detailed, and professionally executed.’”

This feedback reflects HIPINS’ ability to translate complex artwork into premium physical products.

FAQ

Q1: Why was antique gold chosen for this hard enamel pin?
Antique gold enhances contrast, reduces glare, and adds a vintage, collectible tone that complements character-driven designs.

Q2: Is hard enamel suitable for large pins like this?
Yes. Hard enamel provides a smooth, durable surface ideal for large-format pins intended for display or collection.

Q3: How does UV printing work with hard enamel?
UV printing is applied in controlled areas, often beneath translucent enamel or within recessed zones, allowing gradients and fine details without compromising durability.

Q4: Can HIPINS customize limited-edition markings?
Yes. Laser engraving, serial numbering, and custom backstamp designs are all available.

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Conclusion

The Maelstrom antique gold hard enamel pin is a strong example of how thoughtful design, advanced production techniques, and material selection can elevate a character illustration into a premium collectible. Through pin-on-pin construction, hard enamel execution, and antique gold plating, HIPINS delivered a product that balances storytelling, durability, and visual impact.

For creators and brands seeking high-end custom enamel pins with lasting value, this project demonstrates the level of precision and craftsmanship HIPINS brings to every stage of production.

Overview

This project showcases the development of a limited edition pin-on-pin enamel pin (LE60) inspired by the iconic Sailor Moon character. The design combined delicate linework, dreamy aesthetics, and specialty finishes such as cat-eye glitter and gradient printing. With a total of 75 pieces produced, this pin emphasizes exclusivity, premium craftsmanship, and collector appeal.

Client Requirements

The client had a very clear vision for this project:

• Limited Edition Collectible: Back mold stamped “LE60” to reinforce exclusivity.
• Sailor Moon Theme: A detailed depiction of the beloved heroine with closed eyes, flowing hair, and crescent motifs.
• Special Finishes: Requested cat-eye glitter effects in the background, plus gradient printing for smooth color transitions.
• Pin-on-Pin Construction: A layered approach to enhance depth and separation between the background and Sailor Moon herself.
• Protective Packaging: Each pin to be secured with rubber clutches and sealed in PVC bags.

The client highlighted: “We want Sailor Moon to appear luminous against a shimmering night sky. The glitter should glow without overpowering her gentle expression.”

Crafting Process

1. Pin-on-Pin Design:
   • Bottom Layer: A 4-inch base showing a night sky with stars, moons, and cat-eye glitter shimmer.
   • Top Layer: A precisely cut Sailor Moon portrait filled with imitation enamel, providing sharp detail and color vibrancy.
2. Material Selection:
   Gold metal plating was chosen to enrich Sailor Moon’s golden hair and balance the night-sky background. Based on enamel craft standards, gold plating is a preferred choice for high-end collectible pins.
3. Color and Printing:
   • PMS colors were carefully matched: 2001 (gold), 475c (skin), 113c (pearl pink), and others.
   • Gradient printing enhanced the soft blending in Sailor Moon’s hair and cheeks.
   • Glitter and pearlescent effects gave accessories and background stars a luminous sparkle.
4. Cat-Eye Glitter Effect:
   Applied to the sky, this technique used reflective resin with glitter pigments that shift when light hits, producing a gemstone-like brilliance. It elevated the dreamy theme while maintaining elegance.

Client Interaction Highlights

During revisions, the client requested:

• Switching the flat background to a cat-eye glitter sky.
• Ensuring Sailor Moon remained the central focus, with subtle gradients for realism.
• Confirming the backstamp engraving reads “Pure Heart Series – Limited Edition 60.”

Upon reviewing updated proofs, the client responded: “The glitter background gives the perfect cosmic feel, just as we imagined for Sailor Moon.”

Production Workflow

• Mold Creation: Separate steel molds for each layer, ensuring pin-on-pin precision.
• Stamping & Cutting: Outlines cut for clean separation of layers.
• Enameling: Each area hand-filled, then baked to harden.
• Gradient Printing: Smooth transitions applied to highlight Sailor Moon’s expression and hair.
• Glitter Application: Cat-eye resin poured into the sky areas, cured, and polished.
• Plating & Polishing: Gold plating applied, followed by thorough polishing to achieve shine.
• Assembly: The top Sailor Moon layer fixed to the base with careful alignment.
• Inspection: Each pin checked for enamel smoothness, glitter uniformity, and secure attachment.

Post-Production Details

• Backstamp: Each pin marked with the series name and LE60 for authenticity.
• Rhinestone Details: Small 2mm white stones were added to hair accents, creating highlights.
• Packaging: Individually bagged in PVC with bubble wrap, protecting the enamel surface during transport.

Client Feedback

The client expressed: “We are extremely satisfied. The cat-eye glitter sky feels magical, and the pin-on-pin layering gives Sailor Moon depth and elegance.”

This feedback underscores the value of aligning production expertise with creative vision.

FAQ

Q1: What does pin-on-pin mean?
Pin-on-pin refers to a layered enamel pin where an additional design piece (often a character or logo) is mounted on a base pin. It creates depth, contrast, and allows for multiple finishes in one product.

Q2: Why use cat-eye glitter instead of standard glitter enamel?
Cat-eye glitter offers a shifting, reflective effect similar to a gemstone, unlike regular glitter which stays static. It adds a premium, collectible feel.

Q3: How durable are specialty finishes like gradient printing and rhinestones?
With proper baking, polishing, and epoxy sealing, gradient and glitter finishes remain long-lasting. Rhinestones are securely attached during final assembly to prevent loosening.

Q4: What is the advantage of producing pins in limited editions?
Limited editions like LE60 add exclusivity, boosting collectible value. Fans and collectors seek smaller runs, making the pins more desirable and often quicker to sell out.

Q5: Can Sailor Moon-inspired designs be customized further?
Yes. Options include adding glow-in-the-dark effects, holographic printing, or custom backer cards to match the Sailor Moon theme.

Conclusion

This project illustrates the artistry and technical expertise involved in producing a Sailor Moon pin-on-pin limited edition enamel pin. By integrating cat-eye glitter, gradient printing, and rhinestone accents, the design achieved a cosmic, elegant aesthetic while maintaining durability.

The layered pin-on-pin construction allowed Sailor Moon’s figure to stand out vividly against a shimmering background. Combined with precise gold plating and careful finishing, the final product reflected both exclusivity and quality.

As the client’s feedback confirmed, collaboration and iterative proofing were key to success. The result was not just a pin, but a collectible art piece treasured by Sailor Moon enthusiasts.

For brands or artists planning similar projects, the lesson is clear: investing in specialty finishes and thoughtful construction can elevate enamel pins from simple accessories to cherished collectibles.

Overview
The Aurora and Philip project is an intricate two-piece pin that merges the classic elegance of hard enamel craftsmanship with the visual depth of high-resolution printing. This design features a detailed floral wreath, rendered in polished gold-plated metal and rich enamel colors, surrounding a separate printed scene of the two titular characters. The structure is a pin-on-pin (pinonpin) format, meaning two distinct pins are manufactured and then assembled into one finished product. This not only elevates the visual appeal but also allows the use of different production techniques for maximum fidelity in both the frame and the illustration.

Client Requirements
Our client envisioned a pin that would serve as a premium collectible item, ideal for gifting and retail display. The requirements included:

• Gold-plated finish with a flawless, mirror-like polish.
• A durable hard enamel outer frame to highlight the floral design.
• A photorealistic inner scene capturing soft gradients and delicate expressions.
• Incorporation of special effects—clear glitter accents and sandblasted textures.
• Two posts on the back for balance and wear stability, with rubber clutches.
• Packaging suitable for both online orders and physical store sales.

Key Design Decisions and Challenges
Creating Aurora and Philip required a balance between traditional pin craftsmanship and modern print technology.

1. Hard enamel for the frame – This choice ensures vivid, solid colors with a smooth surface flush to the gold outlines. The polished finish enhances the premium feel.
2. Printed insert for the scene – Offset printing allows for fine details, skin tone accuracy, and color gradients impossible with enamel alone.
3. Pin-on-pin assembly – By making the frame and printed scene separately, each could undergo its optimal finishing process before being joined.
4. Effect integration – Glitter and sandblast effects needed to be applied with precision so they enhanced the design without overpowering the central illustration.

Two Special Effects in the Artwork

• Clear glitter over translucent enamel – The floral wreath featured areas where a soft sparkle was desired. We mixed translucent enamel with fine glitter, ensuring the glitter particles caught the light without obscuring underlying color.
• Sandblasted or frosted metal texture – Certain recessed petals and background elements required a matte contrast. We achieved this by selectively sandblasting before plating or applying a matte coating post-plating.

Design and Pre-Production Process
The design phase began with careful art separation: vector artwork for the frame and high-resolution CMYK files for the printed scene. Pantone colors were assigned for the enamel sections, and print-safe colors were calibrated for accurate skin tones. The glitter and sandblast areas were annotated on production blueprints to ensure factory accuracy.

Production Workflow

1. Die-making and stamping – Steel molds were cut to create the raised outlines of the wreath and to shape both the frame and the inner pin.
2. Plating – Both components received gold plating, with selective masking for sandblasted textures.
3. Enamel filling and curing – Colored hard enamel was hand-filled into the recessed areas of the wreath, then kiln-cured for durability.
4. Polishing – The cured enamel was ground and polished flush to the metal surface for a smooth, glass-like finish.
5. Glitter application – Clear glitter enamel was applied to designated areas and re-cured to lock in the sparkle.
6. Printing – The central artwork was offset-printed onto the prepared metal surface of the inner pin.
7. Protective coating – A low-profile UV varnish was applied to seal the printed surface without adding a visible dome.
8. Pin-on-pin assembly – The printed insert was precisely aligned and fixed into the frame using mechanical posts.
9. Back post welding – Two posts were securely welded to the back of the assembled pin, followed by attachment of rubber clutches.

Quality Control and Finishing
Each pin underwent multiple inspections—checking enamel fill levels, glitter placement, print registration, surface polish, and structural stability. Special attention was given to the alignment of the pin-on-pin assembly, ensuring no visible gaps or misalignment.

Packaging
For retail presentation, the pins were mounted on custom backing cards and sealed in OPP bags. Bulk orders for events were packed with bubble wrap and carton dividers to prevent damage in transit.

Client Interaction Highlight
Our client remained engaged throughout the process, reviewing proof artwork, approving pre-production samples, and providing feedback on glitter density and texture contrast. “Our client said: ‘The layered construction and the glitter highlights exceeded our expectations—thank you for preserving the subtlety of the illustration while keeping a high-end finish.’”

FAQ
Q: What makes pin-on-pin construction worth the extra cost?
A: It allows different production methods to be used in one design, maximizing both texture and detail.
Q: How durable are glitter and translucent enamel areas?
A: When properly cured and sealed, they’re highly resistant to wear and color fading.
Q: Can the printed part be made water-resistant?
A: Yes—UV varnish or thin epoxy coating adds moisture resistance without compromising clarity.
Q: Will sandblast textures wear down over time?
A: With normal use, no. The texture is in the metal surface itself, so it’s as durable as the plating.
Q: Why use two posts instead of one?
A: Larger pins benefit from two posts for balance and to prevent rotation during wear.

Aurora and Philip: The Perfect Collectible Pin

Conclusion
The Aurora and Philip pin is a showcase of what happens when artistry meets precise manufacturing. Through the combination of hard enamel, pin-on-pin assembly, and carefully applied special effects, the final piece delivers tactile elegance and vivid storytelling. It stands as a prime example of how to blend traditional craftsmanship with modern printing for designs that are both collectible and wearable.