Make the Card Carry Its Share
Custom Blister Card Packs can fail even when the clear cavity fits the product. The backing card may be too narrow for the sealing area, too weak around the hang point or so crowded by the blister that there is nowhere sensible for branding, instructions or a barcode.
Treat the cavity and printed card as one retail unit. This format is strongest when a compact product needs to remain visible while the card carries branding, instructions and the hanging function.
Start With the Highest Point
Measure the complete item, including the highest or widest feature that will sit inside the formed cavity. A cap, dial, raised button, rounded edge or bundled accessory can determine blister depth even when most of the product is much slimmer.
The cavity should control movement without pressing hard on the product. Too much free space lets the item rotate or slump. Too little can create pressure on the blister, card or product itself.
If the product shape is irregular, work from the real sample or an accurate drawing rather than relying on one length, width and depth figure.
Leave a Working Seal Perimeter
The clear blister normally needs a defined flange or sealing area around the cavity. That space should be planned before the backing-card artwork is finalised.
Do not place important text, barcodes or fine graphics where the blister flange or sealing process may interfere with them. The exact seal method and compatible card treatment should be confirmed as part of the production specification.











