Differentiation and dating of red ink en
✍
Ya-Tong Yao; Jia Song; Jing Yu; Xiang-Feng Wang; Feier Hou; Ai-Lan Zhang; Yuan L
📂
Article
📅
2009
🏛
John Wiley and Sons
🌐
English
⚖ 592 KB
## Abstract A novel approach for differentiation and dating of red ink entries of seals on documents was developed based on ion‐pairing HPLC (IP‐HPLC) and GC/MS. Sixty‐nine red ink pastes of seals were collected and the chromatographic conditions for separation of the dye components by IP‐HPLC and