How to choose a compact photoprinter?Digital cameras become cheaper and more powerful, the mass of hybrids, for example, mobile phones and pocket computers with the built-in digital cameras, or video cameras with a possibility of shooting of photos appears. To an old kind film remain only professional photographers with a long-term experience which cannot come to mind how it is possible are faithful, perhaps, without thinking of composition and lighting, “ to click “ all that it seemed a little - malsk interesting.
However, at all advantages “ figures “ it is worth recognizing that the digital photo - a thing intangible: it cannot be presented to the friend, to sign to darling or just to hang up on a wall. Therefore the photo has to accept traditional “ paper “ the look - it needs to be unpacked. And for the printing of any digital documents as it is easy to guess, printers are used.
Desktop photoprinters are issued already davny - long ago, but we will talk about more “ young people “ them “ relatives “ - about the compact photoprinters capable to be unpacked pictures directly from cameras and a flash - cards. So far such printers are not too widespread, but their popularity everything increases: for certain you saw in computer shops small “ shkatulochka “ unclear appointment. It is also the portable photoprinters allowing to print pictures of the most widespread format 4 x 6 inches or 10 x 15 cm
Before passing to features of a design of these devices, it is necessary to tell that in modern compact photoprinters two technologies of the press are used: traditional jet and sublimation. The inkjet printing is well familiar to much: it is used in the most widespread house universal and photoprinters. In brief we will discuss technical features, and also merits and demerits of both technologies of the press.
The main principle of an inkjet printing - the image is formed by liquid ink which with a force is thrown out of the printing head. There are several kinds of this technology which differ in way of emission of ink: in models of the Epson and Brother companies the piezoelectric technology, in printers of Canon firm - vesiculate, and in printers of Lexmark and Hewlett corporations - Packard - thermojet is applied. In piezoelectric technology ink is thrown out on paper by means of piezocrystals which possess property to be deformed under the influence of electric current and, thus, acts as micropumps.
The thermojet technology differs from piezoelectric in the fact that for the press heating of ink is used, at the same time at the expense of excessive pressure the part of ink is thrown out through a nozzle. Process of heating and cooling repeats huge number of times a second, temperature of heating reaches 600 °C, and time of a thermal impulse does not exceed two million fractions of a second. The vesiculate Canon technology is a special case of a thermoinkjet printing at which emission of ink is carried out only at the expense of the formed gas bubbles arising when heating ink.
Sublimation (from Latin sublimare [“ to uplift “] - transition of substance when heating from a firm state in gaseous, passing a liquid state) the technology of the press essentially differs from jet: here as expendables not ink, and cartridges with a film on which special dye is applied are used. Thanks to heating dye evaporates from a film and is transferred to special paper for the sublimation press. As a result of the same heating of a time of paper open, and dye is fixed on a print then the paper surface becomes smooth and glossy again. Paper can become covered for additional protection of the image by a special film. The press is carried out in several passes as on paper it is necessary to transfer to three main dyes: purple, turquoise and yellow.
Both at jet, and at sublimation technologies of the press there are merits and demerits. Lack of jet models - an image polosnost which is shown in different models in various degree. In many modern models it is almost imperceptible, on condition of full serviceability of the printer, however the situation in a root changes at a contamination of part snuffled or at failure in work of exact mechanics. Besides, a print, received on the inkjet printer it is possible to distinguish on a raster - dot structure of the image, - in particular, on light color transitions. Sublimation printers are completely free from this shortcoming, however for their work specific cartridges with a tape are necessary and (surely!) special paper.
Now we will talk about concrete technical characteristics of portable photoprinters. As a rule, press speed is not the defining factor here - efforts of developers are concentrated on the most realistic color rendition and image sharpness. Nevertheless, as a rule, the actual speed of the press at the printers constructed on jet and sublimation technologies differs a little and makes, on average, from one to two and a half minutes. It is interesting that if any a time ago championship in the speed of the press was held by jet photoprinters, then now sublimation models in which the press of one picture takes about 60 seconds surely shoot ahead.
The declared permission at jet photoprinters makes not less than 4800 x 1200 dots per inch, and in certain cases - to 5760 x 1440 dots per inch. Sublimation printers print with the resolution of 300 x 300 or 310 x 310 dots per inch. Let does not confuse you so low, in comparison with “ " inkjet printers; permission - actually due to features of technology and total absence of granularity quality of prints does not suffer from it at all. Besides, we will remind that pictures reckon with resolution of 300 dpi as photos with “ printing quality “.
Distinctive feature of portable photoprinters - a possibility of completely autonomous press, without the need for connection to the computer and even, in some cases, to the power supply network. All models of this class can print directly from cameras at connection via the USB interface. Separate firms “ more favourably “ in total treat cameras of the production: for example, on the Kodak EasyShare Printer Dock plus printer there is a special socket on which the digital camera of release of this firm can be mounted. For contact with cameras both the universal PictBridge and USB DirectPrint protocols, and the proprietary protocols working only with " are used; own “ cameras. Through USB such printers can be connected also to personal computers to print out, let us assume, the photo from the collection which is stored on the hard drive.
Many photoprinters are equipped built in cards - readers, in most cases, universal, calculated on reading the most widespread formats a flash - cards. Some printers are also capable to transfer contents “ flash cards “ on the personal computer via the USB interface. More and more portable printers can brag of infrared port thanks to which there is possible a wireless press from mobile phones and pocket computers. Distribution “ " mobile phones; with the built-in cameras does this function more and more demanded though, of course, to speak about high quality of the pictures received about their help so far early.
For viewing and simple editing the printed photos liquid crystal displays serve. In cheap models are established it is black - white displays, however all - is more reasonable to pay attention to printers with color screens. Some producers provide also a possibility of connection of the printer to the TV, this function is almost obligatory in case in the device there is no built-in ZhK - the display.
At last, the last, but important remark. On average, regardless of printer type, the price of one print, consists of the cost of cartridges and paper.