This study focused on preparation of chitosan coating crosslinked with 3 kinds of cross-linking agents, i.e. glutaric acid, citric acid, and butanetetracarboxylic acid. The concentrations were varied at 50%, 100%, and 150%wt based on chitosan weight. The results showed that the properties of coated papers were improved. The highest gloss and
smoothness were obtained at 50%wt of butanetetracarboxylic acid and glutaric acid, respectively. Physical properties of the coated paper were also elevated, such as decreased
water absorption, lower air permeability, higher tensile and bursting strength. At 50%wt, it was found that butanetetracarboxylic acid yielded the lowest water absorption, whereas citric acid gave the highest tensile strength. The highest bursting strength was obtained with glutaric acid at 100%wt. Surface property of the crosslinked coating was hydrophilic.