Hygroscopic Agent:
Urea and glycerin are generally used as hygroscopic Agents in the printing paste .They absorb sufficient amount of water and dissolve the dyes
and Carrie's it deeper in to the fibres.during the fixing of dyes the in printing .it also helps in the subsequent removal of the printing paste in washing operation.Optimum amount of hygroscopic agents must be used in printing paste for better results.if too much hygroscopic agents are used then we will not get Sharp printing boundary,and if to less peopleused then their will be lighter printing surface.