• Positive Conventional Plate (PS Plate/Positive PS plate/Positive Plate/Positive Printing Plates/Conventional Plates)
• Positive Thermal Computer To Plate(Thermal CTP Plate/Thermal Plates/CTP Plate/CTP Printing Plates)
• Positive UV Computer to Plate (UV CTP-Positive/UV plates/CTcP plates/UV CTP plate/Computer to conditional Plate-Positive)
• Negative UV Computer to Plate(UV CTP-Negative/Computer to conditional Plate-Negative/Negative Plate/Negative Conventional Plate/Printing Plate-negative working)
If you want to know more,you can just search "offset-plates" on google.