They are under cured.... For sure! There is no other reason, unless you mixed something else into the ink that is not compatible with it.
It is a water-base ink and you must COMPLETELY remove all moisture from the ink before it begins to cure.
It is best to use a dryer with air scrubber, so when the water vaporizes into steam, it can be removed from the surface of the ink.
If you don't remove the steam, it acts like an atmosphere over the ink and blocks the infrared heat waves.
For printers who have "borderline" dryers, we recommend adding "Matsu Fixer F Cure Additive"
It makes the ink film slightly stiffer, but it increases wash fastness tremendously.
Oh yeah, one more thing...... Run all the shirts through the dryer first and print them the same day. That will remove residual moisture that can affect adhesion and printability.
It is a water-base ink and you must COMPLETELY remove all moisture from the ink before it begins to cure.
It is best to use a dryer with air scrubber, so when the water vaporizes into steam, it can be removed from the surface of the ink.
If you don't remove the steam, it acts like an atmosphere over the ink and blocks the infrared heat waves.
For printers who have "borderline" dryers, we recommend adding "Matsu Fixer F Cure Additive"
It makes the ink film slightly stiffer, but it increases wash fastness tremendously.
Oh yeah, one more thing...... Run all the shirts through the dryer first and print them the same day. That will remove residual moisture that can affect adhesion and printability.