Ceramic tiles will never look the same again with the introduction of this revolutionary digital printing system by Johnson. Digital printing is a method of printing using digital techniques in which data and images are printed directly from a computer onto paper or any other suitable medium or substrate.
The familiar digital printer (also referred as ink-jet printer) used in homes and offices for printing documents and photo-quality images employs the digital printing technique.
Digital printing is a non-impact printing technology that uses droplets of inks jetted from a small aperture (nozzle) to a specified position on the media to create an image.
Four colors – cyan, magenta, yellow, and black, abbreviated as CMYK are combined in various ways to create virtually any color required.
Now Johnson has acquired this state-of-the-art system that enables this same printing process to be used on ceramic tiles.
Ceramic tiles can now be decorated with virtually any type of photo-quality image or design on plain or textured surface.
The Intricacies Of The Digital Printer
The heart of any digital printer is the printer head. Every print head contains hundreds of tiny nozzles through which a measured quantity of ink is ejected out. The ink, a special formulation, is made from a suspension of extra fine pigments and is maintained in a reservoir at a right temperature and with the right viscosity The ink is shot from a connected nozzle (having an internal diameter of about 0.04 mm) to the target whose distance can vary from a few millimeters to 1 cm.
Each nozzle has a piezoelectric crystal located at the back of the ink reservoir. When the crystal receives an electrical impulse from the computer it starts vibrating. When the crystal vibrates inwards it displaces a precise amount of ink out of the nozzle.
And when it vibrates outwards, the crystal pulls some ink back into the reservoir to replace the ink ejected out. This entire process happens in the space of a nanosecond (one billionth of a second), precisely emitting a drop or dot of ink that is required to form the design. Hundreds of such nozzles work in tandem to create millions of such drops or dots that together combine to form the desired design or image.
|Digital Resolution – Photo – Quality Prints|
|Ordinary screen print 60 DPI||Rotary printing 120 DPI||Digital printing 300 DPI|
CMYK – Colour Theory
The Digital Difference
|Screen Printing||Roller Printing||Digital Printing|
|Nature Of Printing||On-Contact||On-Contact||On-Contact|
|Printing Resolution||60-80 dpi||100-150 dpi||300-1000 dpi|
|Printing on uneven Surfaces||Not Possible||Very Limited||Practically Any Kind of Surface|
|Prints Edge to Edge||No||Yes, But not Very Uniformly||Precise Edge-To-Edge|
|Wastage||Screens to be discarded after every small production||Roller to be discarded after a limited production||No wastage whatsoever|
|Number Of Colours in a Design||3-4||3-4||Limitless|
|Ramdom variation for a natural look||Can only do repetitive printing||Partial variation||Any amount of variation as desired|