I love this idea for a visual identity - Dona Baronesa studio have designed their stationery by using custom stamps - so that scrap paper and old pieces could be reused. Not so much a new idea - but this is done in a way which you believe, and respect the studio for taking the steps to be more environmentally friendly. Aesthetically very lo-fi, but quite gorgeous in that sense! Nice bright primary colours too! via Quipsologies.