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Digital academy

Learn more about digital technology. We offer training and support to share our know-how and experience with you.

Till SmartPrint systems print using the drop-on-demand inkjet method. Here, a print head transmits small droplets of ink via a nozzle onto the print substrate. This is done without contact, allowing the printing of different surfaces.
Image CMYK bottles

Materials
Till SmartPrint systems print using the drop-on-demand inkjet method. Here, a print head transmits small droplets of ink via a nozzle onto the print substrate. This is done without contact, allowing the printing of different surfaces.
Till SmartPrint machines are universal. In combination with the appropriate pretreatment and ink, we obtain the required properties.

We have experience in the printing of various plastics such as PET, PP, PE as well as glass, with or without coating, and metals such as aluminum and stainless steel.

Printhead
The printhead utilizes the characteristic of piezoceramics to deform under voltage change. An electrical pulse changes the shape of the piezo element. This change in shape causes a pressure pulse in the ink channel, which leads to the ejection of an ink drop at the nozzle. With this technology, water-based, solvent-based or UV inks are used.

RIP Software
A Raster Image Processor (RIP) (deutsch Rastergrafikprozessor) is a special combination of hardware and software, which converts specific data of a higher page description language, such as, PostScript, PDF (VPS, AFP) or PCL into raster graphics, for processing at the printer.

Light and color
Colour is not a property of an object such as its shape. Objects absorb or reflect light of a specific wavelength. We then see the colors, which correspond to the reflected wavelengths. The visible range of wavelengths is between 380 Nanometer (blue light) and 780 Nanometer (red light).

Digital inks are not opaque but translucent. Light penetrates the ink and makes the passage on pigments, which absorb a portion of certain wavelengths of light. The incoming light component in the eye determines the particular perceived color.

In the additive color mixing light of different colors is superimposed. If one superimposes all the colors of the spectrum it appears as white. The additive primary colors are red, green, blue. The additive color mixing is used for screens.

In subtractive color mixing different color components are removed from the white light. Removing all color components produces black. The subtractive primaries are cyan, magenta, and yellow. You can create these, either by removing an additive primary color from white light (Filter) or by superimposing the light of two additive primary colors. Printing inks are translucent substances, the filters act as.

Colored images are printed with the 4 primary colors cyan, magenta, yellow and black (Key) .. The black ink improves sharpness and depth. In the print image the dots of each color are next to each other or partially overlap completely or partially. Looking at the points with the magnifying glass you can see points caused by subtractive color mixing. At normal viewing distance the eye can distinguish no more single points. In this case, the colors are mixed additively.

UV ink
UV ink is applied in the liquid state and hardens by irradiation with UV light. Here no odor, such as the evaporation of solvents arises.

Curing of UV inks is in chemical terms a free-radical polymerization. By a concatenation of small and medium-sized molecules (Monomers and oligomers) a larger entity is created.
The photoinitiators present in the UV ink, the actual starts of the chemical reaction, break apart when exposed to UV light and form free radicals. These radicals react with the reactive centers (i.e. double bonds) of the monomers and oligomers, whereby the double bonds open and pass on the radical. This is a ever-growing chain is created or. an expanding network. During this process, the initially liquid color hardens. At a certain point the reaction comes to a standstill, due to the lack of mobility
No further double bonds can be reached and radicals are therefore frozen. A solid color results.

Resolution
In offset printing, the ink is applied in an even layer in full tone. For different color shades and intensities, a higher resolution film has to be used, that means. Images and text are broken down into dots of a certain size.
Digital print can vary the color intensity over many stages (grayscales) without using classical higher resultion. Thus, even at lower resolutions (e.g. 360 dpi) sharp details can be printed. Inkjet printer can optimize the amount of ink applied on one spot by repeated drop ejection.

As a rough guide for comparison with offset equipment for the 60 screen the factor 10 can be named. A 360 dpi digital printer produces therefore an image with a similarly good sharp detail like a pressure with films of a film with 3600 dpi.

Screens typically have a resolution of 72 to 90 dpi. This is calculated from the number of pixels per line and their length.
There are also graphical objects, which are not broken down into pixels, but as vector files. Objects are defined as a mathematical formula.. This has the advantage, that the objects can be arbitrarily increased or decreased.

Pass Accuracy
Screen printing is a printing method, wherein the printing ink is printed by rubbing through a fine mesh fabric onto the material to be printed. The colors are applied one after the other and must be precisely aligned.

Digital printing used one printhead per color (cyan, magenta, yellow, black, white and possibly special colors) arranged in a specific pattern. Till Smart Print Module have positioned the printheads so, that all colors are printed in a single set wet on wet. Thus we achieve optimal fit.

Technical Characteristics

Adhesion:
Our systems achieve with the certified inks optimum adhesion to various substrates. This ensures, that the paint is flexible enough to adhere well to extreme conditions. Image: crumpled bottles

Dishwasher resistance:
We have certified inks, that meet the standards for dishwasher resistance. This means that 500 Rinse cycles can be carried out without loss of quality of the image.
iv. Food Safety: certified by Till ink manufacturers offer ink on, which is certified for use on the outside of food packaging by an external laboratory. These tests are necessary in particular for plastics, since these materials are permeable to molecules below a certain size. The print images are the same requirements as well as currently used labels and adhesives.

Recycling:
We work closely with European and American recycling organization. The aim is optimal integration of directly printed containers in existing circulation. Image: Flakes in bottle

DPG Einwegpfand:
We have acquired from the German DPG deposit company license, to equip our machines with stamps for application to beverage containers.