 I'm Jim Anderson, Assistant Director and the Criminal Network Subdirectorate, and I'm honored to oversee the Counterfeit Currency and Security Documents Branch, which is a unit that is responsible for leading the International Research Project entitled Physical-Chemical Study of Crossline Intersection. This study was conducted over the past six years by Interpol and the International Academy of Experts in Handwriting and Documents, and it brought together the expertise and knowledge of 120 forensic document examiners from 54 Interpol member countries. In order to examine microscopic differences in written and printed works to determine the exact timeframe that a document was forged or counterfeited. The results of this International Research Project were prepared jointly by Interpol and the International Academy of Experts in Handwriting and Documents. And our study proposed a unique, non-destructive procedure to address this issue, so as to help forensic experts resolve cases of forgery and counterfeit, as well as to preserve the integrity of the evidence for future examinations. This unique, non-destructive procedure is an exciting development in the field of document forensics, and I would like to thank the International Academy of Experts in Handwriting and Documents, and all the document forensic examiners and researchers who contributed their expertise and time to this significant research project. Finally, I would like to thank Daniela Dervaska from the Macedonia Police, who is currently succumbed to Interpol's counterfeit currency and security documents branch, since this research project would not have been possible without her leadership and expertise in the field of document forensics. We wish to share the results of this scientific research project with the International Community, in particular with forensic document examiners in preparation of their expert opinions. The subject of this publication is the relationship between time and inks and the results of preform analysis, which comprise four protocols, namely A, B, C and IN. Protocol A provides the answer of whether or not invisible ink migration can be used for ink dating. Protocol B addressed the question of whether or not visible ink migration can be used for determination of delta T. This is the time gap of execution of two lines. Protocol C answered the question whether or not fading of luminescence can be used to determine delta T. And finally, we have a protocol D, which focus on identifying the chemical components of inks. Significant project conclusions are that visible ink migration can be used for sequencing of cross-inclined intersection, invisible ink migration can be used for ink dating, decreasing of luminescence intensity within cross-inclined intersection can be used to estimate delta T. And we were able to identify luminescence components of inks present in both visible and invisible migration, such as crystal violet and its degradation products. To learn more, you are welcome to consult the publication via I-247 Global Police Communication System as well as Interpol Public Webpages.