Potassium bicarbonate & Urea Intricate (AKA Monnex), used on course B and C fires. More practical than all other powders due to its capacity to decrepitate (where by the powder breaks up into scaled-down particles) in the flame zone making a larger sized area space for free radical inhibition. Grey https://motivational-speaker23567.actoblog.com/29082087/extinguisher-service-secrets