Does heat transfer paper work on plastic?

Heat transfer decals can be applied to many plastic materials such as polypropylene, polyethylene,all kinds of plastic as ABS, PS, PC, PP,PET, PVC. Widely applied in household, furniture, office stationery, electrical products, building decoration materials, cosmetics  packaging etc. Depending upon the image size and the number of parts to be decorated, heat transfer decals can be a cost-effective alternative to other decorating methods, especially for larger orders

Which ink is used for printing on plastic?

The UV and LED curable inks are suitable for printing on rigid plastic, such as dairy containers, cups and most other decorative plastic and foam-based packaging.

Can you use iron on transfer paper on plastic?

The simple answer is, NO. Heat transfer vinyl is a type that needs to be heated and then transferred to the object. It needs a temperature as high as 120-150 degrees Celsius to complete the transfer. Therefore, you can't use it on heat-resistant plastic cups.