When white coverage changes, increasing the white setting immediately can hide the real cause. A better starting point is a repeatable reference print and a record of what changed. This guide describes a quality-control log; cleaning procedures and maintenance intervals must come from your printer's own manual.

Keep a reference file and accepted sample

Create a small internal test file containing a solid white area, fine edges, colour patches and unprinted gaps. Keep its approved dimensions and version fixed. Retain an accepted transfer and an applied sample on a documented garment colour, so future checks have a physical reference.

Inspect samples under consistent lighting. Record patchy coverage, visible gaps, edge changes and colour appearance separately. A photograph helps document a fault, but changing camera exposure or lighting can make it unreliable as the only comparison.

Record the conditions before changing settings

Your log should include date, operator, printer identifier, file version, RIP preset, ink batch, film batch and garment used for application. Add the result of the manufacturer-prescribed nozzle check and any maintenance already performed. Keep the original evidence rather than writing only “bad white”.

For example, Epson notes for the G6070 that automatic cleaning may not detect every clogged nozzle. That model-specific limitation is a reason to follow the documented inspection routine rather than assume automation guarantees a fault-free result.

Separate file changes from machine changes

Compare the current white-layer preview with the accepted preset before altering density. Check whether the same approved file produces the issue and whether the problem appears before or after application. A defect visible on film and a defect appearing only after pressing require different investigations.

When a controlled test is appropriate, change one permitted variable at a time and identify each sample. Do not mix ink systems, add unapproved fluids or perform improvised cleaning. Escalate persistent faults with the log, sample photographs and the exact model information.

Use a clear release decision

Mark each check as accepted, held for review or rejected. Name the person who may release the job. Quarantine doubtful transfers so that a later shift cannot mistake them for approved stock.

• Use the same reference file and viewing conditions.
• Record nozzle-check evidence and approved maintenance.
• Track ink, film and preset changes.
• Identify every trial sample.
• Release production only against the agreed acceptance criteria.

If edges or gaps differ in the software preview, return to the DTF artwork checklist. A quality log should narrow the question before you spend material on another full run.