New Polymer Banknotes to Enter Circulation in November Thailand is set to release new polymer 50-baht and 100-baht banknotes that offer improved durability, cleaner handling and enhanced security features. Polymer notes last significantly longer than paper bills, reducing waste and lowering the long-term cost of currency production. The updated notes will retain familiar design themes while incorporating modern elements such as transparent windows and colour-shifting ink to deter counterfeiting.