Jeongni printing types were made in 1795 (the 19th year of King Jeongjo’s reign) for the publication of Jeongni uigwe tongpyeon, or Etiquette Manuals about Visits to Hyeollyungwon (the tomb of King Jeongjo’s father). They were made based on the characters used in Kangxi zidian (Kangxi Dictionary), which was used as the standard Chinese dictionary during the 18th and 19th centuries. Compared to metal types made earlier, these printing types appear neater and were more convenient to use. The original Jeongni types were destroyed by fire in the type foundry in 1857 (the 8th year of King Cheoljong’s reign). Most of the extant Jeongni types were made at a later date.