DTG on light colored shirts will not leave what is known in the industry as a "hand" (the feel of the print vs that of the garment) as it's using a water based ink. This can be achieved via screen printing as well with water based inks.
When white ink is introduced, the white ink is no longer a water based ink, it needs a binding agent/pretreatment, this creates a hand for the garment.
On darker colored shirts, discharge screen printing is used to create a hand-less feel.
When white ink is introduced, the white ink is no longer a water based ink, it needs a binding agent/pretreatment, this creates a hand for the garment.
On darker colored shirts, discharge screen printing is used to create a hand-less feel.