Tony Finch – blog
We have a periodic table shower curtain. It mostly uses Arial for its lettering, as you can see from the "R" and "C" in the heading below, though some of the lettering is Helvetica, like the "t" and "r" in the smaller caption.
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The lettering is very inconsistent. For instance, Chromium is set in a lighter weight than other elements - compare it with Copper
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Palladium is particularly special
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Platinum is Helvetica but Meitnerium is Arial - note the tops of the "t"s.
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Roentgenium is all Arial; Rhenium has a Helvetica "R" but an Arial "e"!
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It is a very distracting shower curtain.