4 Dyeing

Chromeleathersaredyedeitherdiscontinuouslyindrumsorcontinuouslyonthemachines(through-feeddyeing,spraydyeingordyeingbyrollercoating).Whentheyaredyedindrums,itisusuallycarriedoutduringtheprocessesofretanningandfatliquroingafterneutralizing.However,whentheya ......      (共11845字)     [阅读本文]>>



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