Because water based ink tends to dry very quickly.
To solve this problem you must:
- To work quickly
- To add a small amount of "slowing agent" to the ink
- After every four or five prints you must lift the screen and spray a little water onto the underside of the screen; then you must print once or twice onto wast paper to avoid any damage to the t-shirt; then you can restart printing
- If, during the printing process, the ink becomes too viscous, you can spray a little water directly onto the ink
- It is important to remember that when you use water based ink the design area must always be covered with ink, because the constant movement of the ink helps to prevent drying.
If you would like any further information or help, please do not hesitate to contact me again.
Kind regards
Franco Ratto

This is Franco Ratto,