Roll to roll screen printing machines are used in various industries that require printing on continuous rolls of fabric, paper, plastic, or other materials. Some of the industries that use roll to roll screen printing machines include:

1. Textiles industry: For printing on continuous rolls of fabric used for clothes, bedding, curtains, and other applications.

2. Packaging industry: For printing on flexible packaging materials like plastic films, paper bags, and pouches.

3. Label industry: For printing on labels used in the packaging of products.

4. Advertising industry: For printing on banners, billboards, and other display materials.

5. Electronics industry: For printing on flexible circuit boards, flexible displays, and other electronic components.

6. Automotive industry: For printing on car upholstery and interior components.

7. Medical industry: For printing on medical devices, packaging materials, and other products.

8. Industrial materials industry: For printing on materials used in the manufacturing of various products.

These are just some of the industries that use roll to roll screen printing machines. There are many more applications for this type of printing technology.