This Surface Sizing Agent for Kraft & Corrugated Paper has the advantages of less dosage, lower cost and easier operation. It can significantly improve the water-resistance and ring crush strength of board paper, corrugated paper and fine paper. Specification Appearance: White to Light Brown Liquid PH Value: 3-5 Solid Content: 30%(±2%) Water Solubility: Easy Viscosity: Max. 30 cp. s(25℃) Ionicity: Cationic Shelf Life: 6 months Package and Storage Packed in 200kg or 1000kg plastic drum. The product should be stored under the condition of 4-25℃, and the proper temperature should be below 30℃. Notice Application temperature should be below 75℃.