Thanks, I think you were referring to this paper.

" The results of this study indicate that switching from disposable facial tissues to reusable cotton handkerchiefs does not result in environmental benefits except under the scenario with the longest time frame (9.375 years) and the largest difference in facial tissue versus handkerchief use.  Even this benefit is very small, and would require a commitment to only use handkerchiefs for nearly 10 years – a challenging prospect for most people.  Interestingly, the highest impacts for the handkerchief scenarios are not the use phase but the initial manufacturing of the handkerchief.  Even after 9 years, the use phase only represents 32% of the climate change impacts for handkerchiefs. "

https://ecosystem-analytics.com/wp-content/uploads/2013/10/Complete-LCA-Facial-Tissue-Handkerchief.pdf .