CENTERMINT / TOOLS & GUIDES
How to find the inner border on a full-art card
Separate the physical card edge from an inner reference line. Learn when full-art card centering can be measured and when a result would be a guess.
The outer edge and the inner reference are different
The outer edge is the physical boundary of the card. The inner reference is a consistent transition in the print that lets you compare the surrounding border widths. Silver, gold, yellow and dark borders can all provide a reference; color alone does not decide where it lies.
A character, title banner, attack box or foil reflection can create a stronger line than the actual border. Choosing that line can move the top or bottom inner frame far into the artwork.
A practical four-side check
- Locate the physical card edge without including the sleeve, case or background.
- Follow the border-to-print transition at several clear positions along each side. Avoid rounded corners and highlights.
- Check that all four selected lines describe the same kind of reference. A line above a title is not interchangeable with the bottom edge of that title box.
- Use the loupe to compare uncertain positions with the original image. Improve the photo if the transition is obscured.
Why a fixed inset cannot be the answer
A plausible inset is useful for narrowing a search area, but forcing equal distances assumes the answer before measuring. Print alignment, cutting and design families vary. A correct result must preserve real imbalance instead of automatically centering the inner frame.
Illustration: if the left and right border widths are 3 mm and 2 mm, replacing both with 2.5 mm would report 50/50 and erase the real 60/40 measurement.
When there is no measurable inner frame
Some borderless or full-art designs do not have a single continuous inner reference on all four sides. Do not treat an arbitrary rectangle or a default 50/50 as a measured result. A matching official design reference may help interpretation, but alignment to a template would need its own validation.
If only two sides are clear, that does not establish the other axis. Record the uncertain sides separately or use a clearer card side. Reflective and sleeved cards may require another photograph.
What we can claim
CenterMint combines automatic frame suggestions with manual edge control and a focus loupe. These controls help inspect and correct a result; they do not prove every color or full-art design is detected accurately. Demonstrations and generated sample cards are not substitutes for an independent labeled photo test.
This guide describes a measurement method, not an official grading policy. Published scales such as CGC's distinguish card categories; do not apply a sports-card threshold to every TCG card.