How long do homemade scratch off cards last?

Homemade scratch off cards have a limited shelf life because the DIY coating is not as stable as an industrial one, and moisture is what breaks it down.

• Stored in a cool, dry place, DIY scratch off cards typically last about 3 to 6 months before the coating starts to degrade.
• Humidity is the main enemy, since it softens the coating over time.
• Heat and direct sunlight can also speed up wear.

If you need cards to hold up for a campaign that runs over several weeks or months, professionally printed cards with an industrial scratch coating last far longer and stay reliable through handling and storage.