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FLEXO Magazine : June 2014
Show your true colors and reduce your downtime. Call us at 888.493.5396 or learn more at www.flexowashus.com. LEADING CLEANING TECHNOLOGY FOR ANILOX ROLLS, PLATES AND PARTS Print true Orange. (and juice up your bottom line.) “Their” Orange FlexoWash Orange ceramic on the cell walls referred to as recast. Melted and rehardened ceramic is believed to be harder than the “as sprayed” ceramic on the surface of the anilox and assists with durability of the engraving. Fiber optic technology, because it burns at a shorter pulse length, does not create as much recast. In addition, the recast that is formed tends to accumulate in little nodules at the corners of the cell. Added to this, multiple pulses inside each cell can harden the nodules, causing them to become brittle. The end result can be chipping or breaking of these particles, creating premature wear and/or tiny scratches or wide score lines on the anilox. BANDED ROLL TEST Since the anilox industry’s implementation of thermal lasers, the focus has been to increase anilox linescreen and cell volumes. Where a 4.0 bcm may have been utilized at a 400 linescreen, today it is common to produce the same volume at a linescreen of 600 and higher. The 600 linescreen at a 4.0 bcm produces cleaner print than a 400 linescreen at a 4.0 bcm because less of the 4.0 bcm volume transfers to the printing plate. Print is cleaner, but density is reduced and engraving life is compromised. Again, a better approach, in most cases, is to decrease the anilox linescreen and cell volume to reduce the ink film thickness transferred to the printing plate. This will produce cleaner print and anilox cells that are more resistant to wear and plugging. “The benefit of fiber optic technology is the ability to produce a wider range of linescreens—from 35 lpi all the way up to more than 2,000 lpi—increase cell depth and volume per linescreen, and have cell bottoms that are flatter, shallower and smoother than a comparable CO2 engraving. ” Image 2: By establishing the correct combination of lip, bcm and depth to opening ratio insures consistent print performance and maximum anilox life.