Bellissima Screening, so named after the Italian word for 'most beautiful' is the brand name for Hamillroad's “Digitally Modulated” or DM Screening for Flexo. Bellissima perfects flexo screening as it achieves a high level of image detail that was previously unobtainable, whilst achieving a quality of print normally associated with gravure.
Bellissima Digitally Modulated Screening utilises ground-breaking technology to create a unique product that is most accurately described as a fusion of the best characteristics of AM, FM, XM, GS and CS screening techniques, whilst avoiding their limitations and problems. By maximising the [flexographic] plate and press properties of halftone screening, it dramatically enhances quality and stability. We are busy verifying that it offers all the other attributes normally associated with DM Screening, specifically an enhanced color gamut as well as substantial ink savings.
Taking advantage of the immense computing power now available, DM screening is so named because it digitally modulates each and every pixel it produces, precisely controlling not only the dots in each separation, but also between the separations so as to completely eliminate noise. It does this through the use of a "stochastic rosette", which interleaves the screens in all the separations. By doing so, it eliminates noise (and moiré). The "stochastic rosette" also maximises the amount of ink-on-paper and minimises the amount of ink-on-ink, which expands the available color gamut whilst eliminating color shifts on mis-registration.
The screening analyses each pixel it produces to ensure that no dot is too small to plate or print, no ‘non-dot’ is too small to fill-in and no dot or ‘non-dot’ is too large so as to be visible. Dots are created in a carefully controlled manner, to ensure detail is placed exactly where it is needed, vignettes are smooth and flat tints are, well ‘flat’. It cleverly modulates each pixel based on a deep understanding of laser optics, plate technology, printing press behaviour and ink flow to ensure that dot gain is eliminated, resulting in the removal of patterning artefacts and graininess.
The result of this is a quality of print, particularly on flexible substrates, that was previously unachievable.
Based on years of research and experience, the patent protected screening represents a fundamental change in the expectation a flexo printer should have on the quality of print that is achievable. No longer are printers restricted by issues with moiré, mis-registration, rosette drift, color shifts, dot gain, dot loss, shadow loss, hard vignette breaks etc... but they are free to do what they do best - print ‘beautiful’ pages.