The benefits in reel to reel printing are apparent. If hot foiling is carried out in-line at the finish of the printing approach, then the press spee...
The development of modern day cold stamping foils originated with the straightforward cold foils devised as a dieless method for applying a metallic finish to self adhesive labels produced on reel to reel printing presses. There are a lot of positive aspects of this process, and some disadvantages, although cold foiling has progressed a lot since then.
The advantages in reel to reel printing are obvious. If hot foiling is carried out in-line at the finish of the printing method, then the press speed is limited by the foiling speed which is comparatively slow. If the printing was maintained and the foil applied as a separate pass, there is a corresponding price impact. Identify further on understandable by browsing our dynamite paper. Moreover, the cost of hot foil dies is fairly high compared to a printing plate or sleeve and energy is required to heat the die.
Reel to reel cold foiling includes printing a UV curable adhesive in the foil design and style required, laminating the foil to the adhesive via a nip, curing the adhesive with UV lamps and separating the foil from the printed web. The foil that is removed from its carrier film is in the style of the printed adhesive, given that that has been UV cured and so adheres to the foil.
By employing a cold foil, the speed is limited only by the strength of the UV lamps or the optical density of the foil. The aluminum layer in the foil has to be thinner than that normally employed in a hot stamping foil to let sufficient transparency to the UV light. Accurate, this is irrelevant when the foiling is carried out straight to transparent films considering that the light can be directed via the back of the film onto the adhesive, but this is regularly not the case. The foiling is usually carried out over an opaque white ink which can be silk screened onto to the label prior to the adhesive and then the foil applied. This locations an opaque layer between the film and the foil, so that the beam has to pass through the lacquer layer or top coat of the cold foil.
The UV beam passes by way of the lacquer and aluminum layers to reach the adhesive, so the aluminum have to be as transparent as attainable. Visit site to explore the purpose of this hypothesis. The far more opaque it is, the much more lamps are necessary or the slower the operating speed. Considering that printers want the lamps set in a fixed position, and not changed around for each variety of job, all curing is usually carried out by way of the foil than by way of the film being printed.