FLEXXO Industrial Equipment macchine periferiche nel settore del converting e stampa flessografica.

Tecnologia di incisione Multi-hit

Continuing its twenty years of prominence in the field of laser engraved ceramic anilox rolls, Praxair Surface Technologies has introduced two new engraving technologies to the flexographic printing market as well as the gravure, offset coating, and laminating markets — “ART” (Anilox Reverse Technology) and “REV” (Revolutionary Engraving).
Praxair constantly strives to find new methods of improving the flexo process, and ART and REV equipment, ART engravings have a unique appearance, and differ from the standard anilox engraving due to the unusual configuration of the cells. A raised surface, or post, between the cells supports the doctor blade, while the smooth surface of the engraving itself provides
the superior laydown, which is a major characteristic of ART technology.
Over two years in development, ART provides a smoother laydown of coating, which offers are the latest result of on-going research, experimentation, testing and development, as well as years of press runs under actual conditions to refine and determine the benefits and values of these new engravings.

ART: What Is It, and What Will It Do For Me?
The ART engraving is an example of advanced helical and tri-helical cell wall technology.
Although produced with conventional laser higher density for the same amount of product transferred, as opposed to conventional engravings. This also means there will be less density loss from incomplete coverage. The problems presented by pinholing are essentially eliminated with the use of ART engravings, as a result of exceptional laydown qualities. ART has
been found to be especially effective in printing white on film, and in using white inks on other applications as well. ART engravings, therefore, are of special benefit to the flexible packaging market, as well as to gravure printers, due to their
improved solid coverage, and solid print quality.
This smooth laydown offers several additional advantages to the printer, one of the foremost being the ability to easily clean the surface of the roller, due to the smooth engraving. The usual deep cell bottoms of traditional engravings that tend to “trap” ink, adhesive or varnish, are eliminated in an ART roller, thus allowing the ability for quick clean-up. Higher cell volumes are also attainable with ART engravings. Testing has determined that, in some instances, volume can be nearly doubled, with the potential of a 90.0 BCM cell volume being attainable. Individual results will vary, of course, depending upon actual pressroom conditions.
The Differences and Advantages of REV
REV engravings offer many of the same advantages as ART engravings, but focus on high end needs where the printer will be capable of printing ALL color requirements in one print station, from solids to fine dots. Therefore, the time and cost savings generated with the use of REV engravings are immeasurable.
REV engravings have a 90-degree spiral, or helical, groove, around the circumference of the roller, creating a “ridge” upon which the doctor blade can ride—similar to the ‘post’ of the ART engraving.
The use of REV gives the printer an engraving with higher densities, better ink transfer, and improved solid coverages. Created using either conventional CO2 (carbon dioxide), or YAG (yttrium - aluminum - garnet) laser technology, the smooth surface of the roller means that there will be virtually no actual “cells”, resulting in increased doctor blade weep wipe which creates an improved transfer of the ink film. The smooth surface further contributes to eliminating vibration problems caused by conventional engravings, as well, resulting in improved press operation. As with ART engravings, REV rolls also support excellent clean-up capabilities; again, as a result of the smoother roll surface characteristics.
REV also facilitates faster startup, due to the fact that adjustments need to be made only once. With standard engravings, machine speeds need to be adjusted as pressures are increased. With REV engravings, once initial test runs have been completed, and the plates are cleaned, these additional adjustments are not necessary, thus saving time in the pressroom.
Only a REV engraving will enable a printer to do one job with a single specification. The improved print quality attainable with REV rollers versus a standard 60° roll will offer improved dot gain and better print contrast. For the first time, text, fine process work, and light solid densities are all attainable with one engraving on one laser engraved ceramic anilox roll!
Will ART or REV Work For Me?
Do you work with white inks? Are you interested in producing thick, smooth laydown of solids, such as adhesives, varnishes, and other coatings? Would you like to have the ability to print all of your process requirements with one engraving? Is it important to you to have rollers that are quicker and easier to clean than standard engravings? If any of these circumstances apply to your company, you will find ART and REV engravings are obvious, and excellent, choices for your graphic operations. If you are interested in learning more about ART and REV, the Technical Sales Representatives of Praxair Surface Technologies will be pleased to discuss the numerous qualities and advantages of these exceptional new engravings. They will be able to assist you in choosing the correct choice of engraving and exact specifications for your specific needs. Call today!