POPFIL MAC-30 Styrene Maleic Copolymeric Syntan App : Clear Slighty Viscous Liquid Chemical Nature : Styrene Maleic Rasin Active Matter : 30%ï? Â±1 pH of 10% Solution : 7.0 â?? 8.0 Solubility : Readily Soluble in water. PROPERTIES: Popfil MAC 30 is designed for retannage of all types of leathers to impart fullness, tightness and a fine break to chrome & semi-chrome tanned leathers. Popfil MAC 30 gives unique combination of tight grain with mellow handle. Popfil MAC 30 imparts excellent body to the treated leather. Popfil MAC 30 is light fast and is ideally suitable for aniline leather and white or pastel coloured leathers. APPLICATION: IN RETANNAGE:- Popfil MAC 30 is used for retannage of chrome tanned leathers to improve fullness and tightness of grain. A dosage of 3-5% is recommended. IN CHROME TANNAGE: Popfil MAC 30 may also be applied in chrome tannages.