Invisible ink for MD municipal elections

"Literary Detective: On the Trail of Invisible Ink," NPR, September 5, 2009:

. . . Scantegrity and the government of Takoma Park, Md., partnered to conduct a mock election earlier this year, which went relatively smoothly. And though it might sound unusual in the age of so many electronic-voting machines, the city plans to use invisible ink for its municipal elections in November.

"It might have been kind of a hard sell to their board of elections, this new and untested technology," Collins says, "except that everybody actually recognized it from their own childhoods."