We rarely travel together to the US, just meet each other there (him from NRT me from LHR) I just remembered that he told me about a time in the past when his finger reacted to an ink. I think the point is that as I don't have exzema I completely didn't recollect the process myself. He DOES keep antisceptic wipes with him... just in case.

Good to be reminded that technology has made this process safer!