Here is a simple guide to solve commonly experienced problems in printing. If you don't find your answers here please email us at info@convertechblades.com
Cylinder Wear. Doctor blade wear.
Ink or varnish does not bind to each other or to the substrate.
Ink adheres to back of web in rewind.
Printed ink has milky white looks
Spider web-like build up on blade, impression roll cylinder & in oven
Weak print. Colour intensity varies light to dark
Air bubbles on surface of ink
Very light and uneven transfer of ink in non-image area
Solid areas show random areas in which ink is not transferring - Dots missing in process printing
Solid areas have variation in colour - grainy pattern
Printed image transferring to idle roll
Over printing ink not transferring over underlying inks pick back.
Small uncoloured holes in printed area
Dried ink rubs off printed product
Definite pattern of cell walls. Ink not flowing out
Small random spots of unprinted area showing through a deposited ink missing dots in process
Hair lines of ink starting from printed area occurring in random directions
Distinct solid lines that occur in non-image area. This condition may be continious or intermittent. Lines move as blade oscillates
Relatively wide streaks that show up in non- image area. Usually in non - systematic pattern
Wavy print pattern in direction of web travel
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