[BitBucket user: Tomas Zubiri]
[BitBucket date: 2019-11-08.00:58:09]

Note: According to dcm4che’s dicom conformance statement, they support grayscale softcopies and hardcopies, I should investigate how they handle them.   
  
https://www.dcm4che.org/docs/conformance/dcm4chee-cs.pdf