Roosje de Groot is fascinated by Padauk, an African wood that is bright orange-red when freshly sawn. Under the influence of the sun it changes into a dark brown over time. Inner Shelf plays with this phenomenon. Upon opening the shelf shows this intense colour, but soon it shows the signs of use. While noncovered parts change colour, objects that stay put on the shelf leave an orange 'print'. If you want to keep the original colour, just leave it closed to keep the sunlight off. This way a shelf on the wall becomes an emotional object to be cherished.