Dhaval colour chem. Pvt ltd ensures various types of screen printing machines. Rasta bars color-coded interlocking shims are part of those products. It has the simple solution to off-contact problems caused by high-density ink, puff ink, and low-tension screens. Rasta bars color coded interlocking shims are easy to use. These screen printing machines are available in three sizes. It is easy to retrofit virtually any older textile press.