Standard Doctor Blades
Standard doctor blades have a completely consistent blade thickness. Throughout the lifespan of the blade, the contact area with the roller remains consistent, resulting in completely consistent color tones. The unique polishing treatment of the blade edge allows the blade to quickly conform to the roller at the start of printing, reducing waste.
Beveled Doctor Blades
The larger bevel angle design of the blade edge reduces wear on the blade, and the reduced contact area provides a clearer ink scraping effect. The larger bevel angle also reduces blade breakage. The bevel angle ranges from 4° to 15°, suitable for short-run, multi-color printing.
Coated Doctor Blades
The doctor blades use a carbon steel base material with a nickel coating. The coating provides excellent corrosion and oxidation resistance. It is ideal for printing with corrosive inks and varnishes. During use, the coating also compensates for minor damage to the blade caused by impurities in the ink, thus reducing color variations and streaking. Coated doctor blades are very suitable for coating applications.
Pointed Doctor Blades
This new type of doctor blade can be used in gravure printing presses where the doctor blade angle is difficult to adjust. Pointed doctor blades provide elastic tension while maintaining a high contact angle. This unique design ensures stable doctor blade pressure while maintaining the correct contact angle. Reduced printing pressure means extended roller life and reduced streaking.
Trapezoidal Doctor Blades
With the advancement of science and technology, research on printing doctor blades shows that trapezoidal doctor blades are increasingly being adopted by printing manufacturers because their contact area with the plate roller remains constant from beginning to end, resulting in consistent printing quality. The vast majority of doctor blades used in the market are this type of trapezoidal doctor blade.
