How do you store a sealed Japanese booster box?

A sealed box is cardboard wrapped in film. Moisture, light, heat and pressure damage it over time. Here is how to prevent that.

The spot

• Dry: about 40 to 50% humidity. A hygrometer and a few silica gel sachets in your storage box help against peaks.
• Dark: sunlight fades cardboard and print. So don't keep boxes on a windowsill or in a display cabinet in the sun.
• Room temperature without big swings. Attics, sheds, garages and basements are bad places: hot in summer, cold and often damp in winter.

The box itself

• Keep the seal intact and don't keep taking the box out of the cupboard. Without the factory shrink wrap a buyer can no longer tell whether the box has been opened; read what no shrink means.
• Flat or upright makes little difference, as long as nothing heavy is on top. Don't stack too high: the bottom box will dent.
• A clear box protector or an acrylic case with UV protection keeps out dust, knocks and light.

Paperwork

Keep your order confirmation or receipt, and any photos of the box. If you sell later, it shows where the box came from.

At Kaikan Cards

We photograph every box before shipping (Seal Guarantee); you get the photos on request. More on storage: storing Pokémon cards properly, why storage matters and the best Japanese sets to keep sealed. We make no promises about future value.