Additional file 1 of Characterization of Korean handmade papers collected in a Hanji reference book

Additional file 1: Figure S1. A map of Hanji workshop locations in Korea. The map was according to the Hanji making workshop information in the four-volume of reference handmade paper sample collection book Hanji, Korean handmade paper [42]. Figure S2. (B) and (C) are projections in a* and b* space of colour gamut from the studied Hanji samples. Figure S3. Scores plot and loadings plots in PCA analysis of the general property data in Table S1. The variation factors of FC, CC, FM, SFM, BL, BM, DY, Do has been digitalized as input number of 1,2,3…And the weightings of the variables were using 1/STD, where STD stands for standard deviation, for principal component analysis. Figure S4. Scores plot in PCA analysis of the mechanical property of Hanji with mappings of tensile strength value in grain-direction (A) and cross-direction (B), folding endurance value in grain-direction (C) and cross-direction (D). PCA was performed with tensile strength and folding endurance data values without normalization. In general, the Gadumtteugi (G) and Heulimtteugi (H) Hanji were clustered into two parts with Heulimtteugi Hanji locate in the positive PC2 coordinate while Gadumtteugi Hanji situated in the negative PC2 coordinate: Mapping with the tensile strength value (grain direction), within each type, they can be classified into three groups with the tensile strength ranging from low, medium and high (A); while mapping with the cross direction value (B), Heulimtteugi Hanji can still be classified into three groups meanwhile the Gadumtteugi Hanji is divided either low or high types; mapping with the folding endurance value (grain direction) (C), the low and medium value were clustered together; while mapping with cross direction value showed that Gadumtteugi Hanji has weak values in the cross direction folding endurance (D). Figure S5. The total ion chromatogram (TIC) of Hanji sample made with paper mulberry fibers (A) and the extracted ion chromatogram (EIC) of pyrolysis products of terpenic compounds distribution pattern exampled with paper mulberry as raw material (B). For compound assignment, see Table 1. Figure S6. The total ion chromatogram (TIC) of Hanji sample made with paper mulberry fibers (H1-01), gampi fibers (H1-05) and mitsumata fibers (H1-06). Figure S7. (A) is the TIC chromatogram while (B) is the EIC m/z at 218. In (A) and (B), (I) is Hanji and (II) is Washi. (C) is the enlarged demonstration of the region in (B), (D) is the mass spectra of compound X1 after background subtraction and (E) is the NIST library search results with high match factor. Figure S8. The ration of the EIC (m/z at 218) area of X1/T1 (in percentage). The data are from 12 test of Hanji papers and 12 test of Washi papers that have signals of X1 and T1 at EIC m/z at 218 and respective retention time at 59.6 min and 59.7 min, respectively. Table S1. Some general property data of the handmade paper samples attached in the four-volume Hanji reference book book that data analyses have been performed in this study.