Cards: Yes! Glassine is 100% compostable and can be mixed into your backyard bin or pile. You can also reuse the sleeves to store seeds from your garden. Prints: No, unfortunately. PLA requires high heat in order to break down completely. Otherwise, it will simply break apart into smaller pieces and won't be fully composted. PLA can be sent to composting facilities which are equipped to process compost at the necessary high temperatures. If you do not have such a facility in your region, some recycling programs will accept PLA. Please check with your local waste management for disposal options.