| Microspectrophotometry is a tool used in questioned document analysis. Previous research has shown that different inks can be distinguished using this technique. However, little work has been done to determine if the paper influences the color of the ink.; This project addresses this issue by applying blue, black, and red ballpoint ink to 50 sheets of white paper of various types. The color of the ink was determined by using the S.E.E. 2100 Microspectrophotometer in the reflectance mode. The ultraviolet and visible/near-infrared regions were explored. It was discovered that paper type does not influence the color of ink in the visible/near-infrared region, but different papers do give different spectra for the same ink in the ultraviolet region. |
