Our Cationic Rosin Size is one kind fortified rosin/aluminium sulfate’s cationic dispersed liquid,wide used as paper and paperboard internal sizing agent,it can be used when the pH is 4.0-8.5, the best pH range is 4-5.5.The Cationic Rosin Size particle very fine,fine particle size 0.6 to 0.8um,the product is more stable and effective, final paper is durable with high strength with very small dosage.