... --350GSMReady colors: white, black, red, yellow, orange, royal blue, light blue, dark blue, green, purple. Colors also can be customized if you ... the ink will continue through and leave unwanted marks. To block out these holes, materials such as tapes, specialty emulsions and ... of screenprinting is that large quantities can be produced rapidly with new automatic presses, up to 1800 shirts in 1 hour. ...