Greasy And The Printing Image Carrier example essay topic

1, because, because of, the same, only, the only, one, . Offset has become very popular because of the high, quality of image transfer., . In some cases you n mix different types in the same line., . Among the three methods of printing letterpress is the oldest one.

3, -. All this work is done at the same time... Offset presses are the only ones that use dampening unit., . You must know paper properties because paper is the basic material of the print shop., -. Only better grades of paper are made of rags... 2.3. 3, I II.

( 4 6. The research work done at this laboratory will greatly help the printers., , . Working at the composing machine the operator must be very attentive., . The illustrations produced at this print shop are always of high quality., , . Photocomposition being widely used in graphic arts, our country needs more specialists in this field., . The man showing the ingredients of the printing isles to the students is our engineer technologist., , -.

Gravure plate has man cells of different sizes, some of them holding more ink than the others., , . 2.4. 4, : Printing in lithography is accomplished b applying ink and water solution to the specially treated areas of the plate., , . You can't develop graphic arts industry without developing photographic methods... After making the impression the plate is inked again., , . 2.5. 5: ... you may be surprised to learn -, , , ... good printing characteristics for pictures -... to overcome the problems of the cylinder-making stage -... of general importance -... is increasingly utilized -... 2.6. 6.

Printing PROCESSES 1. Letterpress or relief printing is the oldest form of printing. You know already that la relief printing the printing image is raised over the body of the image carrier. Image transfer is accomplished by applying printing ink to the raised areas of the image carrier and by transferring the resulting ink image to the printing stock in the press under pressure. -., , . 2.

This discription summarizes the essential features of relief printing. But you m b surprised to learn how many different relief image carriers exist and how widely the various methods of relief printing differ from each other... In intaglio printing the non-printing areas are on top of the image carrier whereas the printing image is sunken in the depth of the carrier material. For printing, all sunken portions or cells are filled with ink, deeper cells holding naturally, more ink than less deep ones.

The quantity of ink transferred to the paper varies according to the depth of various cells., , ., , , , ... One of the most interesting questions at the moment is the future of gravure. It is the most suitable process for long-run colour printing because of the durability of its printing surface, good 'printing characteristics for pictures and ease of inking system control. However, cylinder making being expensive and slew, gravure can only be used for long runs.

Efforts are being made to overcome the problems of the cylinder-making stage. If these are successful'; then gravure could be much more widely used... - ., , , ., . The term 'planographic printing' is used for a group of printing methods which are all based on the image carriers having the printing areas and the non-printing areas practically in the same plane. Immediately the question cornea to mind, how it is possible to apply printing ink to the image areas without at the same time applying it also to the non-image areas if both are on the same level.

The answer to this question is based on the long-known fact that grease and water do not mix. Printing inks for planographic printing are quite greasy and the printing image carrier is specially treated to make the printing areas ink receptive and the non-printing areas receptive to the dampening solution under the same conditions., , ., , , , . At present, offset lithography is the only planographic method of general importance. Like letterpress, offset lithography has equipment for short, medium, and extremely long runs; it is used for job-and commercial printing, magazines, package material, book production. Web offset is increasingly utilized for the printing of newspapers... , , , , ... 2.7. 7, : gravure, ink, image carriers, dampening; cells, letterpress, long run.

Gravure is mostly used for LONG RUN colour printing. Many different. IMAGE CARRIERS... are used in letterpress as well as in all other printing methods. For printing the CELLS of the cylinder are filled with INK. In... LETTERPRESS. the image is raised whereas in.

GRAVURE... it is sunken. In lithography every printing cycle requires DAMPENING of the plate before inking. 2.8. 8. What major printing processes do you know The major printing processes are: the letterpress, the gravure and the planographic printing. How is printing accomplished in letterpress In the letterpress the printing areas on the image carrier are higher then non-printing ares. Where are the printing and non-printing areas situated in a gravure image carrier In a gravure image carrier the printed areas are sunk into the non-printing surfaces.

Why is gravure most suitable for long-run colour printing. The gravure is most suitable for long 0 run printing because of the durability of its printing surface, good 'printing characteristics for pictures and ease of inking system control. How is the printing plate treated in lithography In lithography the printing plate is specially treated to make the printing areas ink receptive and the non-printing areas receptive to the dampening solution under the same conditions. What work is offset lithography used for The offset lithography is used for job-and commercial printing, magazines, package material, book production.