Developed by Pablo Silva the vanishing spray which has been lauded by the worlds media during the 2014 World Cup has been in use since 2000 in a professional level over in the Brazilian Championship.
The shaving foam look-a-like is 80% water, 17% butane gas, 1% surfactant and 2% other ingredients.
When the referee sprays the turf the butane expands when the pressure changes, forming small drops of butane, covered with water, onto the ground.
Eventually the butane evaporates, leaving only water and surfactant residue on the ground to mark were the wall can’t go and the semicircle were the kick is to be taken from.
(Surfactants are compounds that lower the surface tension (or interfacial tension) between two liquids or between a liquid and a solid.
They may act as detergents, wetting agents, emulsifiers, foaming agents, and dispersants.)
[So now you know ! ….. I didn’t ! ! ]
It has been an undoubted success during the World Cup in Brazil and no-doubt the major European Leagues will take it on board, it wouldn’t surprise me to see UEFA using it in this seasons Champions League Group stages.
However what would be good is for linesman, oops referees assistants should also have it to mark the position of a throw-in, players always infuriate fans by gaining extra yardage with a throw-in.
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