If you notice ink stains outside of the printed area of the T-shirt, there may be residual ink on the platen's frame or top plate or lint and ink may have built up on the print head. Check the frame and platen and clean them, if necessary.
Note: Transfer the
printed T-shirt to the heat press with care; the ink is wet and can
smudge.
If you notice stains developing over time outside of
the printed areas, it may be caused by residual dye from
dark-colored T-shirts transferred to white or light-colored
T-shirts when using a heat press. The residual dye then reacts with
perspiration and sunlight and can discolor. Clean the press surface
and use a release sheet on top and under the T-shirt when pressing.
Use new sheets or use them according to the color of the T-shirt.
If you have placed cloth on top and under the T-shirt, place the
sheets in the positions shown below. If you have placed cloth on
top and under the T-shirt, replace it with new cloth or use a
different cloth according to the color of the T-shirt.
Components in the cotton pre-treatment solution may coagulate during storage. The coagulated components can stick to the fabric and cause unevenness. Filter the solution to remove any coagulation before using it.