A process for improving water flux of a thin film composite (TFC) membrane , comprising: (a) providing at least one TFC membrane having at least a felt layer on a backside , a support layer , and a discrimination layer on a front side ; (b) applying a backside treatment solution containing from 0.1 wt% to 33 wt% of a tertiary amine salt of camphorsulfonic acid as a pore structure protection agent only to the backside of the TFC membrane to form a backside-treated TFC membrane; and (c) drying the backside-treated TFC membrane to yield a treated TFC membrane , the treated TFC membrane having a water flux that is greater than the water flux of a TFC membrane prepared without treating the backside with the backside treatment solution, wherein the tertiary amine of the tertiary amine salt of camphorsulfonic acid is selected from among a trialkylamine having 1 to 6 carbon atoms in the alkyl moiety, a pyridine having 0 to 3 alkyl groups of 1 to 6 carbon atoms, an alkyl-alcohol-amine, an N-alkyl-pyrrolidine having 1 to 6 carbon atoms in the alkyl moiety, an alkylbenzylamine, and a heteroaromatic tertiary amines or a combination thereof, wherein the discrimination layer comprises a polyamide wherein the drying step comprises heating the treated TFC membrane until a surface of the treated TFC membrane reaches a temperature of at least 75°C. (a) providing at least one TFC membrane having at least a felt layer on a backside , a support layer , and a discrimination layer on a front side ; (b) applying a backside treatment solution containing from 0.1 wt% to 33 wt% of a tertiary amine salt of camphorsulfonic acid as a pore structure protection agent only to the backside of the TFC membrane to form a backside-treated TFC membrane; and (c) drying the backside-treated TFC membrane to yield a treated TFC membrane , the treated TFC membrane having a water flux that is greater than the water flux of a TFC membrane prepared without treating the backside with the backside treatment solution, wherein the tertiary amine of the tertiary amine salt of camphorsulfonic acid is selected from among a trialkylamine having 1 to 6 carbon atoms in the alkyl moiety, a pyridine having 0 to 3 alkyl groups of 1 to 6 carbon atoms, an alkyl-alcohol-amine, an N-alkyl-pyrrolidine having 1 to 6 carbon atoms in the alkyl moiety, an alkylbenzylamine, and a heteroaromatic tertiary amines or a combination thereof, wherein the discrimination layer comprises a polyamide wherein the drying step comprises heating the treated TFC membrane until a surface of the treated TFC membrane reaches a temperature of at least 75°C. wherein the tertiary amine of the tertiary amine salt of camphorsulfonic acid is selected from among a trialkylamine having 1 to 6 carbon atoms in the alkyl moiety, a pyridine having 0 to 3 alkyl groups of 1 to 6 carbon atoms, an alkyl-alcohol-amine, an N-alkyl-pyrrolidine having 1 to 6 carbon atoms in the alkyl moiety, an alkylbenzylamine, and a heteroaromatic tertiary amines or a combination thereof, wherein the discrimination layer comprises a polyamide wherein the drying step comprises heating the treated TFC membrane until a surface of the treated TFC membrane reaches a temperature of at least 75°C. <EOS>