It was thought that such an approach would lead to producing large panels, usable for example as wall decor in a hotel lobby or corporate office. In a further development, the researchers used very thin copper sheets in place of the decorative sheet (still overlaying that with the melamine-impregnated top sheet). The overall effect was like a large metal medallion, or a copper sculpture. Many impressive samples emerged from the research lab. The product simulating natural slate proved to be a very popular product and was a leading seller for many years.