A mischievous Spanish law student went to extreme lengths to cheat on his exams by etching answers on to his pens, his teacher has revealed.
Yolanda de Lucchi, a professor at the University of Malaga, showed the pens she and her colleagues confiscated during the test.
She displayed the 11 pens, each with tiny writing etched across the plastic body of the blue biros, in a post on Twitter.
A mischievous Spanish law student went to extreme lengths to cheat on his exams by etching answers on to his pens, his teacher has revealed
Ms De Lucchi said the pens were confiscated during an test on Criminal Procedural Law.
The crafty student was exposed a number of years back but the teacher rediscovered the offending items while cleaning out her drawer.
She posted on Twitter: 'The criminal procedural law in BIC pens. What art!
'Cheat sheets aren't like they used to be.'
A close-up of the pens shows the incredible detail of the ruse, with tiny letters filling every available space.
One Twitter user who replied to the teacher claimed to be a friend of the cheating student.
The crafty student was exposed a number of years back but the teacher rediscovered the offending items while cleaning out her drawer
Gonzo said: 'Hello Yolanda. I know the author of that wonderful work perfectly. In fact, he has authorized me, ignoring his name, logically, to show you some more that he still keeps at home.
'The technique used by the artist, as he himself tells me, was to replace the graphite lead of a mechanical pencil with a needle, which made it super easy for him to etch the pen.'
Gonzo then showed off a number of photos of the biros modified over the years.
De Lucchi said: 'That could not happen today.
'Now students would not make an effort to have such a detailed cheat sheet for an exam.
'They live at the click of a button, by what happens instantly; that is impossible to see today.'