Mono sand even erases ink. Sand erasers do not erase graphite from the paper. Instead the micro sand particles scratch finest layers from the sheet of paper. Therefore even ink can be deleted with sand erasers. This method can also be used in a creative way to create "nostalgic" or "shabby chic" looks, i.e. for lettering artwork. Important: Use heavy aquarelle paper (300gr) for best results. Material: PVC free