Guide to Designing Custom Enamel Badges: Line Thickness, Colour Separation and Cut-Out Spacing
Designing custom enamel badges is not just about creating something that looks good on screen. To manufacture well, a badge design also needs to work within certain technical limits.
Details such as key line thickness, colour separation and cut-out spacing all affect how cleanly a design can be produced. If those elements are too fine or too close together, the finished badge may need to be simplified before production.
This guide explains some of the main design considerations to keep in mind when creating artwork for custom enamel badges, helping you avoid common issues and achieve a better final result.
Why enamel badge design rules matter
Enamel badges are made by separating different coloured areas with raised metal lines. Unlike printed artwork, colours cannot blend into each other, and very fine details do not always translate well into metal.
That means artwork often needs to be adapted slightly to make sure it is suitable for production. Understanding a few basic rules early on can save time, reduce revisions and lead to a cleaner finished badge.
1. Key line thickness
Key lines are the metal borders that separate each enamel colour. These lines are essential in both soft enamel and hard enamel badge production, as they keep colours divided and give the design its structure.
As a general rule, key lines should usually be at least 0.3mm thick. If lines are too thin, they may not show clearly in production or may not be durable enough in the finished badge.
If your design includes very fine outlines, small lettering or detailed illustration work, it may need to be simplified slightly to work well as an enamel badge.
2. Colour separation
In enamel badge manufacturing, each colour area needs to be separated by metal. This is one of the main differences between enamel badges and printed badges.
If two colours are touching in your artwork with no dividing line, the design will usually need to be adjusted before production. This is why bold, clearly separated shapes tend to work best for enamel badges.
For more complex artwork with gradients, shading or tightly packed colour changes, a printed badge may sometimes be the better option.
3. Cut-out spacing
Cut-out areas can be a great way to make a badge more distinctive, but they also come with manufacturing limits. If the cut-out space is too narrow, it may not be possible to produce it cleanly.
A typical minimum spacing for cut-out areas is around 1.2mm, although this can vary depending on the design and badge size.
This is especially important when designing shapes with small internal gaps, narrow holes or closely spaced cut-through areas.
4. Small details and text
Small details often look clear on a computer screen but can become difficult to reproduce once scaled down into metal. Tiny lines, dots and narrow gaps may disappear or fill in during production.
Text also needs careful consideration. Very small lettering can become hard to read, particularly if it is reversed out or surrounded by fine detail. As a general guide, text should be large enough to remain legible at the final badge size.
If your design includes a lot of detail, it is often better to simplify the artwork slightly than to risk a cluttered result.
5. Soft enamel vs hard enamel limitations
Both soft enamel and hard enamel badges use metal lines to separate colours, but they behave slightly differently in production.
Soft enamel badges are often better for designs with more texture and definition, as the recessed enamel and raised metal lines create a more tactile finish.
Hard enamel badges have a smoother, more polished surface, but this can make certain intricate effects and cut-out details less suitable depending on the artwork.
If you are unsure which option is best, it is worth comparing the finish you want with the level of detail in your design. Check out our soft vs hard enamel guide for more info!
6. Plating, finish and artwork format
The metal finish you choose can also affect the final look of the badge. Gold, silver, black nickel and antique finishes all change the character of the design, and some work better than others depending on the style of the artwork.
It is also best to supply artwork in a clear vector format such as AI or EPS where possible. Vector artwork helps ensure line work, shapes and spacing can be reviewed accurately before production begins.
Final thoughts
Designing custom enamel badges involves more than choosing colours and shapes. The best results come from artwork that not only looks strong visually, but also works within the practical limits of badge production.
By thinking about line thickness, colour separation, cut-out spacing and small details early on, you can avoid unnecessary revisions and create a badge that manufactures cleanly and looks great in the finished product.
If you are planning a badge design and want advice on the best format or finish, our custom pin badges page is a good place to start.