13mm disc stud 6mm stainless steel stud with butterfly back plain Aluminium back beautifully presented in an Aluminium tin Sublimation is a specialised printing process that transfers images from paper to metal via heat. It is a permanent surface treatment however care must be taken to ensure your jewellery stays in great condition. Avoid spraying with perfume or other sprays, keep out of direct sunlight for long periods of time and store in the packaging provided to avoid scratching the surface.