Despite the popularization of product personalization systems, it is difficult for people to personalize a product in a way that symbolizes themselves and their daily lives. Borrowing the characteristics of patina generation, we suggest patina-inspired personalization as an alternative approach. This approach is a way of progressive personalization through transforming digital traces of product use into patina-like material traces on a product. As an exemplar, we developed Trace-Marker, a custom-built laser engraver for bicycle riders. It engraves aesthetic patterns on a bicycle bag according to a user’s bicycle journey. During the field trial with 10 participants for three weeks, participants used the system to add symbolic meanings, in particular their unique identities and personal stories on their bags. The permanently engraved patterns enhanced the emotional bond with the bags. Based on the field trial, we discuss implications for improving patina-inspired personalization in wider contexts. 
Lee, MH., Son, O., & Nam, TJ. (2016, June). Patina-inspired personalization: personalizing products with traces of daily use. In Proceedings of the 2016 ACM Conference on Designing Interactive Systems (DIS '16). Association for Computing Machinery, New York, NY, USA, 251–263. https://doi.org/10.1145/2901790.2901812

Lee, MH; Nam, TJ; "Possibility of Utilizing Digital Traces for Enhancing Emotional Values of Digital Artifacts", 디자인학연구, vol.29, no.2, pp.65~77, 2016.05
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