According to a Giesecke & Devrient press release, the Royal Monetary Authority of Bhutan switched the printer and substrate for its 1- and 10-ngultrum notes dated 2013. These notes (B216b and B218b, respectively) are now printed by Giesecke & Devrient, not De La Rue, and are printed on a composite (Hybrid), not paper, substrate.Courtesy of Thomas Krause (Polymernotes of the World).