No, the force scale of ZERO is not linear, but follows a curve with different trends. This is why two Force 4 do not correspond to a Force 8, for example, just as two Force 8 do not correspond to a Force 16. It is true, however, that the use of two Zeros at the same time is possible and that there is an increase in the quantity of principle present in the mixture and therefore substantially to its Force. We advise against the use of overly charged mixtures, having considered Force 8 a satisfactory upper limit.