A preferred artistic medium comprises a first translucent sheet having at least one first image presented thereon, a second translucent sheet having a least one second image presented thereon, the second image being substantially identical to the first image, wherein at least a portion of at least one...http://www.google.es/patents/US6898883?utm_source=gb-gplus-sharePatente US6898883 - Translucent artistic medium and method for making
