The Argentinian Football Association has approved the use of a vanishing spray to mark off the required 10 yard wall rule in the top flight after extensive testing during 2nd division matches over the course of the last 6 months.

Via FourFourTwo

Referees pace the regulatory 9.15 metres between the ball and the nearest defender and then spray a white line on the pitch to mark the correct position of the wall.

The line then disappears from the pitch within a minute.

Referees carry the spray in a small aerosol can weighing 115 grams.

Pablo Silva, a sports journalist who invented the spray and has worked with chemical engineers to develop the product, said the idea came to him when he was foiled at a free kick during an amateur game several years ago.

I’ve actually seen something similar to this that can be used on pavement or walls that can be used as touch lines and goals.

Image via KentToussaint