Durst Rho 750HS UV-curable inkjet printer Print

So many printers are exhibited at FESPA it will take all week to sort them out.

We will report more once we learn from an actual installation what the Durst Rho 750HS can accomplish. It has a notable print width, 2.05 meters.

The Durst brochure makes special mention of MEMS technology printheads. Earlier MEMS printhead technology failed in the L&P Virtu HD8, failed in the Yuhan-Kimberly textile printer being developed by Keundo. Both printer projects were cancelled. This was two years ago and it would be logically assumed that Durst is not using those particular Spectra MEMS heads.

MEMS printheads were not successful in an HP Scitex printer introduced at SGIA two or three years ago and then abandoned. HP bought NUR because their printers functioned better. However now HP Scitex is using a similar MEMS printhead in its HP Scitex FB7500 system. Downside of those printheads is that you need to replace them frequently. Benefit of a MEMS printhead is that they do not cost anywhere near as much as a regular industrial printhead (per head that is). But if you replace a $500 head four times more often than a $2000 head, the up-front cost savings per-head is not meaningful (except in a spec sheet that does not explain the end of the story).

Because most full-system MEMS heads did not function circa 2006-2008, now engineers have developed hybrid MEMS heads, which means a printhead has some of the features of earlier MEMS heads but also still has traditional features (which work better than the MEMS features).

Durst has capable R&D department, so we estimate they have selected a printhead that is better than earlier ones. Durst has many capable engineers too, so it will be interesting at some point to inspect their Durst Rho 750HS and learn how the MEMS heads differ from earlier models and how they function.

Durst Rho 750HS printer reviews
The Durst Rho 750HS printer was exhibited at FESPA trade show 2010.

Green, Orange, or Violet ink colors

When you need to achieve a particular corporate logo color, some UV-cured inks are not adequate: reds are too orange, yellows are too green, greens may be too yellow. UV-cured ink in general has colors that are not the same colors as in solvent, mild-solvent or latex ink (each kind of ink is excellent in some colors, not good in other colors, and sort of okay in other colors). So be sure to do print samples of the specific corporate colors (logo colors) that you need to achieve. Every brand of UV-cured ink is different in which colors are good and which are iffy.


First posted August 9, 2010.