Log room humidity and temperature daily so environmental drift is visible — not a universal threshold claim.
White ink is sensitive to its environment, and drift goes unnoticed without logging. This procedure records what you observe; it does NOT prescribe a universal humidity band. Your approved source defines the acceptable range and corrective action for your specific equipment.
Do not apply a universal humidity threshold. Use the range your manufacturer specifies for this model, and escalate if you cannot hold it.
This is buyer/owner guidance that organizes decisions and accountability. It does not claim universal equipment-specific facts, counts, fluid instructions, or physical steps. Exact procedures for your model come only from the approved manufacturer source. Confirm against your equipment's service manual before acting.
Generic buyer/owner guidance — applies across DTG/DTF models. Not a manufacturer-authorized procedure and does not claim applicable models. Always confirm against your equipment's service manual.
Read the hygrometer near the printer (not the wall).
Record the actual reading.
Log the humidity and temperature in the note field.
Trend data is what makes drift visible over time.
Compare the reading to the range in your approved source.
If outside the approved range, follow the approved corrective action.
Record the check-in with a timestamp.
If the reading is outside range, flag an exception.
Approved environmental spec for your model
reference topic — approved source required
Environmental control reference — approved source required
reference topic — approved source required
If this procedure didn't resolve the issue, file an escalation. It routes to Supervisor on duty · BuyersLab@hopedez.com with the supervisor + Buyers Lab on copy.