In most states, it is not hard to find a working room humidity of 35-45% humidity to keep your dye sub ink jet printers in a controlled state. Often those areas are along the rivers or oceans and the heat is the most challenging issue.
Anyway, there are some very arid states, such as Arizona, Colorado, Nevada, New Mexico, Utah, Wyoming and others where the humidity is quite low and will cause issues with your printers ink jet head clogging due to the dryness. The situation can get aggravated by any forced air heating systems.
General industry recommendations are to keep the dye sub printers in a closed room with a good quality humidifier that can cover the room’s cubic space and keep the humidity constant at 35-45% humidity. That also assures you that your print room is clean and free of outside dust. Most dye sub printers will require more attention to keeping them clean, also.
Select a humidifier and a water source that does not contain hard mineral deposits, as these can create a white chalky dust or film and that is not good for the printers. Using demineralized or purified water is best. You also need to clean your humidifier often and effectively. You can make a choice on Ultrasonic, Cool Mist or Warm Mist smaller units available commercially, or even go into a larger system for a print room that is larger.
Quite often, a lot of dye sub printer users will place a small plastic tray or empty maintenance tank in their printer cabinet with an absorbent sponge that has been filled slightly with water to allow the humidity to fill the printer cabinet by the print head & pump cap assembly, also. We call this little device the “Humidor” and it has saved a lot of printers over the years!
Be sure to remove the Humidor before you start to print! Hanging a colorful ribbon on the tank is a good idea, as well as a note card over the printer controls as a reminder to remove the Humidor from the cabinet before use.
Lastly, keeping a cover on your printers when not in use is advised to keep them clean and free from airborne dust, lint, hair and other foreign materials that might settle into the printer overnite or over the weekend when the printer is not in use.
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