The most commonly used colloid based formula in burns is

Muir and Barclay formula for colloid is =0.5* percentage burnt surface area* weight(kg) = one poion. A total of 6 poions are given in 36 hrs 3 poions : 1 poion every 4hrs in 12 hrs 2 poions : 1 poion for every 6 hrs in next 12 hrs 1 poion : Remaining 1 poion in the last 12 hrs