There are many inks which adhere to rigid vinyl. Proper ink should be chosen taking the applications or desirable finish into consideration. As the heat resistance of the substrate is not good(50°C)(122°F), avoid heat drying.

Pre-caution
The use of vinyl materials has been recently restricted due to environmental problem they cause.
Vinyl material contains chlorine which emits dioxins if the incineration temperature is low when they are incinerated. PET-G, A-PET and pre-treated PP are used as substitution for rigid vinyl. PVA and flexible PP are used as substitution for flexible vinyl. Please search the inks for these materials.