If anyone tries to sell your customers aftermarket ink for riso comcolor x1 or Gd series ink let them know itís pure crap . Iíve experienced pressurized ink tank codes low pressure tank codes, weeping ink heads,pools of ink in the machines and ink cartridges that wonít properly seal . The machines using this junk have all had drastic increases in service calls for dirty running machines,ink codes and print quality. I hope this may help some of you that have customers that are thinking about cheap ink . Itís not worth it,these machines are running us nuts and it really just got worse since they started using junk supplies .