In flexo printing, you need to produce high-quality prints quickly and efficiently. Using the wrong type of doctor blade on your printing press can lead to scoring on the anilox roll and ink spitting.
It would be best if you used metal blades that work for your machine, ideally fitting their function. If you try to save money by using unsuitable blades, you will spend more in the long run on maintenance and reprints.
Don’t Skimp on Costs
Purchasing suitable doctor blades might cost a little more upfront, but they can save you on ink and substrate costs. Consider what your printing needs are and consult with a professional about the shape and functionality of your doctor blades.
Things to consider are the type of ink you use, the medium you are printing on. This will determine the bevel shape, edge type, and blade material. Metal blades are still the most common and versatile type, but you may want to use plastic for specific instances. Also, you need to decide thick your blade should be and if the edge needs to be coated.
What Causes Scoring?
Scoring occurs on anilox rolls when the wrong blade or configuration is used. If you experience scoring in your roll, it is not necessarily the blade’s fault. Check your holder alignment, loading pressure, and the ceramic surface condition before you discard the doctor blades. If the holder is not periodically cleaned, this can also lead to misalignment that causes scoring. Maintenance of your doctor blades and anilox rollers will go a long way towards extending your equipment’s life.
Choosing the suitable doctor blades for your printer helps to guarantee a quality, repeatable print. However, choosing the right edge is only the first step. You also need to align them properly and seat them in a way that does not score the ceramic surface on your anilox roll.