I am still thinking paper, and with a little bit of light outside, I was able to capture the writing and drying time examples on Rhodia paper I discussed a few weeks ago here.
But in the scheme of things what is 30s?
Postscript:
BTW, I didn't experience any smearing whilst writing. The smearing tests are just that, tests set up rather than naturally occurring.
I have experienced acute smearing at other times, but not with this smaller sized Rhodia.
30 seconds is your hand moving back across the page and smudging what you just wrote.
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