Computer-to-plate (CTP) technology is used on a daily basis in offset, screen-printing workshops, and flexography. As for pad printing business, computer to plate equipment – laser plate etching systems – are introduced only recently. However, with latest developments, laser-based methods have the potential to conquer pad printing market place over the next couple of years.
CTP benefits: Laser systems enable the user to transform ctp machine in China to a best etched image in just one to 5 minutes. Costs of movies, chemicals, consumables shipping, coverage units and removal of hazardous substances are removed, as are maintenance contracts on processing tools and costs of outsourcing steel plate making. Double-sided laser etched plates can accommodate up to 4 images, which reduces plate usage.
There are 4 steps to create a plate: import the graphic file into the system ‘s software, apply the halftone style to the image, specify the etch-depth parameter in the laser ‘s operating software, and then press start. Laser-imaged graphics are first generation so there’s no decrease of resolution.
Etch depth and halftone pattern can be accurately fine-tuned to match the type of image you want to rheology, the viscosity, and print of the ink used, the pace of the printing machine, so the durometer of the printing pads used. As specifications will be saved on the computer, resulting photo quality is totally repeatable.
Laser-based CTP programs can accommodate ctp machine laser diodes for fine, combination fine/bold, and bold graphics. Laser-engraved plates have a straight-walled etching and more accurate inkwell than polymer cliches and thin or thick steel plates.
Choosing a CTP system: Laser type. These days, three styles of lasers have been utilized to build pad printing plates: diode pumped Yttrium Aluminum Garnet (YAG), Ytterbium fiber laser (YAG wavelength), and CO2. The main differences between these units are maintenance, spot size, and power to etch various materials.
Maintenance – The diode-pumped YAG has a diode bar that heats up and can warp after about 10,000 hours of use, requiring costly replacement. The Ytterbium fiber and CO2 lasers do not have any diode bar so they have absolutely no maintenance requirements for up to 70,000 hours of operation. Spot size – As the wavelength of any YAG laser (1.064 microns) is ten times smaller compared to the CO2 wavelength (10.64 microns), the former can produce a lot more detailed pictures than CO2. Materials – YAG lasers are ideally suited for metals. A CO2 laser beam is substantially better absorbed by organic materials – wood, paper, plastics, glass, textiles, and rubber.
Software. To ensure seamless integration into the workflow on the target company, laser program should be able to import are,ai (Adobe Illustrator),,dxf (CorelDRAW, AutoCad), as well as,bmp (bitmaps, gradients, process color images) files. to be able to achieve halftone or dot design, the software program should have the ability to apply many hatches (or even separation anhubg the laser lines) to the image. For good line graphics a tiny hatch can be applied, for bold graphics an even greater hatch may prevent “scooping”. The energy and frequency of the optical maser has to be adjustable to finely tune the plate degree to deliver likely the greatest printing plate for the type of ink, production speed and substrate. The target level of etch in the plate is,001″
System features. The cron ctp have many available features to consider: Size of system footprint – stand alone or maybe benchtop system. Vector-tracing software. Micro-adjust focal distance. Plate registration systems. Particulate evacuation systems. Pre-etch laser pointer. Availability of auto-load.
It may look like a little odd that Europe seems to be at the front side of this technology, one normally thinks of Japan or perhaps the Usa for originality but for after legislation may have been a help instead of a hindrance. Europe has enhanced it’s expectations of business meeting environmental requirements in a way that is forcing changes in the workplace.
Traditional film making uses chemical substances that are dangerous in use and hard to dispose of, perhaps this has improved the demand for earlier film products to enhance. Many litho printers (us included) will have used laser plates at once or perhaps another for simple short run one colour jobs, it is easy and quick, printed directly from the desktop. The issues are damping issues that make these plates tough to operate these days it is accomplishable to develop positive metal plates using inkjet film. Each and every year the report from DRUPA is the progress the printing business is making in CTP.