A smear staining apparatus comprising a staining section which stains a smear sample with a quantity of stain fluid and a controller, wherein the controller receives information regarding a stain state on a smear sample which is stained according to a first staining condition by the staining section and determines a second staining condition on the basis of the information and a target value which defines a targeted stain state, is disclosed. A smear processing system and method for determining staining condition are also disclosed.
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