To　analyze　the　features　of　printing　ink　in　the　transfer　process,　the　elastohydrodynamic　lubrication　theory　was　used　to　analyze　the　maximum　pressure　and　the　thickness　of　the　ink　in　the　contact　area　between　a　soft　ink　roller　and　a　hard　one.　This　paper　ascertained　the　viscosity-pressure　coefficient　of　a　yellow　printing　ink　by　experiment　and　analyzed　the　influences　of　the　load,　speed　and　the　materials　on　the　pressure　and　the　thickness　of　the　ink　in　the　contact　area.　Analysis　shows　that　with　the　increase　of　the　load,　the　ink　pressure　increases,　the　thickness　of　the　ink　decreases,　and　the　thickness　of　the　ink　tends　to　be　a　stable　state.　When　the　speed　increases,　the　ink　pressure　almost　does　not　change,　and　the　ink　thickness　increases.　The　change　of　elastic　modulus　of　the　hard　roll　has　slight　effect　on　the　ink　pressure　and　the　thickness　of　ink,　and　the　pressure　increases　with　the　increase　of　the　elastic　modulus　in　soft　roll;　however,　the　change　of　thickness　is　not　obvious.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.