Hero Arts Color Layering Clear Stamps: Croissant. Sweet pastries and fruit, ready for layering to bring out all their delicious beauty. Hero Arts clear design stamps peel off their backing and stick to acrylic blocks for easy positioning. Mix and match the designs, then easily store them for another time. Made in the USA from genuine photopolymer, which is non-toxic, biodegradable, and designed specifically to transfer ink to paper for a true impression every time.