Abstract
First, having noticed that the paper on which the Mugujongkyong from the Sokgat'ap was Broussonetia Kazinoki Siebold, produced under the Tochim process, it is confirmed that the paper used for printing the Mugujongkyong form the Sokgat'ap was Broussonetia Kazinoki Siebold produced in Shilla, by introducing the common fact that the papers on which : written in 755 A.D.) and in Soochung-sokt'ap Hwaomasa were written were the same paper fabricated by the Tochim process. Therefore it is proved that the printing place of the Mugujongkyong from the Sokgat'ap was also Kyongju region in Shilla. Furthermore it is proved that the year of storing Broussonetia kazinoki Siebold n which tarani of the Mugujongkyong was written was circa 705 A.D., provin12g that Broussonetia Kazinoki Siebold was in production in Shilla in 8th Century. Also by confirming the fact that very thin -- mere 0.019mm thick -- Broussonetia Kazinoki Siebold was in production in Shilla in 8th Century, it is proved that Shilla has ability to produce Broussonetia Kazinoki Siebold for Woodblock printing purpose. Second, concerning the Muju Characters written in the ugujongkyong from the Sokgat'ap, mixed use of the Muju Characters was noticeable in written in 755 A.D. from the Sooch'ungsokt'ap at the Hwaomsa written in the same era and the Tripitaka Koreana in Japan was printed in 690's A.D. because of appearance of the Muju Characters in the Saddhamapun-darika is erroneous.