I saw these Sintra prints at the National Arboretum in Pittsburgh during a recent trip there. In this case they were showing the size and markings of different penguins in their museum displays.
Sintra is a PVC foamed sheet that accepts ink beautifully, can be cut into shape cleanly, and is completely waterproof. A good idea where penguins are involved! When printed with our UV cured flatbed printers, it is also durable and has a reasonable life in sunlight, usually about 3-5 years. We like it for museum displays.
We also print a lot of museum displays on gatorboard, which is lighter and stiffer than Sintra. It’s our material of choice for all manner of indoor displays.