The published articles are meant to primarily educate the students in printing to supplement their knowledge in the field of Printing. These are not simple Glossary of printing terms, but to the extent possible every term has been explained in brief so that it can be of some use to the students who appear in some sort of examinations and interviews.
I served the Printing Industry for over 40 years
in various capacities, a major part in an Security Printing Organization. In order not to waste the printing and paper related knowledge which I gained over years, I decided to keep them in public domain for the reason stated in prepara. Most of the illustrations - over 90% - have been generated by me to explain the terms suitably.
While I am not sure to what extent the published content will help, if the content is going to be of use to some one in some manner, I will be greatly satisfied.
Your views may be sent to me ( for my record and correction wherever needed.



- Over 400 terms-

Click on this line to read from 'A'

Monday, September 24, 2012

Alphabet - M /2

10. Mark-Up copy: The instructions usually written on the manuscript ( model version of each section of the printed material ) to guide type setting process and the compositor. These instructions would indicate the type face, point size, weight of paper to be used, headings, captions etc. Also the proof read copy is called mark up copy. They too contain several instructions in brief.  The methods and techniques for marking copy are evolving rapidly. The illustration below will show how editors' and proofreaders' marks are used in hard-copy editing which is submitted as mark up copy.

11. Matte Finish : It a term used both in photographic and Printing processes to indicate the surface finish of the paper.
Unlike coated stocks which give glossy effect, the matte finish printing paper does not strain the eyes and show the image in sober color. The absence of glare help make the print viewable from any angle without straining the eyes. This also suits best for ink jet printing.
The matt finish photographic papers (Bromide papers to take photo prints from films)  can give portraits a softer appearance even though the same print on glossy paper will be vibrant. But for process work,  prints on  glossy paper is discourages as the camera lights falling on the glossy paper can cause glare during exposure of the films.
In the case of films, the matt finish refers to  slight rough surface on the emulsion side of the film. The matt films will be ideal to work with Photo polymer plates which have smooth surface. The photo polymer plates work well with matt base films as they give better contact between the film and the plate surface and does not slip due to smooth surface of the  plate  and also the chances of static electricity occurring on account of two smooth surfaces - smooth base film and smooth surface plate- are minimized.
12. Mechanical Binding: The technique of binding the books and note books  which are pre trimmed to correct size. This process does not  require any adhesives, stitching or sewing and uses plastic material or thin metal called spirals to keep the loose leaves bound. They are inserted in the holes punched on the back portion of the books and rotated to hold from end to end  and therefore this mechanical processed binding is  called mechanical binding. Example of such binding includes Comb binding or spiral binding.  The dairies, table top calenders, desk note pads, thesis papers, research papers, annual reports, budget reports and other jobs are done by this technique -mechanical binding.

13. Mechanical pulp : In the paper making mills both wood pulp and cotton comber pulps are used for making the paper. While cotton comber pulp is used for very good quality and smooth paper, the wood pulp paper is used in newsprint, as well as papers used in telephone directories, catalogs, cheap priced magazines, paper towels and tissues etc. Since the wood blogs are mechanically converted into fibers it is called mechanical pulp.
In the paper making process the cotton wool is chemically treated to make pulp while in the case of wood pulp, the wooden chips are ground against stone grinders (special machine) which first chip  them into fibers and then with the crushed wooden fibers the pulp is made. The process of mechanical pulping  involves forcing logs against a revolving stone which grind   the logs into pulp by abrasive action. The stone is sprayed with water to remove fibers from the pulp stone as well as  to prevent the fiber getting damage due to friction-generated heat. The advantage  of mechanical pulp  is that it produces high pulp yield thus reducing the cost. It is stated that the wooden fiber yield is around 90-95% compared to the cotton comber  fiber pulping which yields around 75-80 % good quality (long) fibers only. The mechanical pulp paper has more ink absorbency, but at the same time the paper strength will be less (ex : News Papers) compared to other good quality paper used in magazines. Since the wooden logs contain natural organic compound known as lignin which is sensitive to light, the paper shade turns to brownish or discolors in few days when exposed to light. This is another disadvantage of using mechanical wood pulp.
14. Mechanical Tint: The artists while making art or designs, produce special effects by drawing lines and dots of different thicknesses. Some times the special effects are also given in some portions with different design elements.  But such an exercise takes much time. In order to hasten the said process the mechanical tint design papers have been introduced. The patterned sheets are made by different manufacturers . The mechanical tint design papers are something similar to the adhesive papers used in labels, but carry reproducible printed design elements on it.  The basic difference between the adhesive labels and the mechanical tinted papers will be the paper thickness and transparency. The mechanical tinted paper will be very thin so that it can easily merge with the art work without showing relief on surface. Sheets of mechanical tints representing a full range of values of dots, screen ruling, lines, waves, and other designs available as mechanical tint paper will be cut up and directly added to drawings. Such mechanical papers with color elements are also available to speed up production artists work in color. Wherever needed, the design elements will be cut to the design shape and pasted into the art work directly . The mechanical designs are mostly used on art works that combines photographic halftones with graphic design and are of simple nature. 

15. Metallic Ink : Metallic ink contain powdered metal like pigments that simulate metal. It is those particles that makes the images shine. Metallic inks not only give glossy look to the print but also enhances the quality. The metallic inks are also used in inkjet to print on garments as a spot color, which however fades away after  few wash . Therefore the metallic inks can not be mixed with other colors as they will affect washability. Generally the metallic inks are not used on high  web printing presses as the ink is hard and does not have smooth flow and the the metallic particles need to be kept on mixing constantly to mix up well with the base ink. Even then metallic inks to print on Offset and Letterpress machines are available in the industry.
Oil based inks specially formulated by different ink manufacturing firms for printing by Offset exhibit excellent luster on print and has a good rub resistant quality. Metallic inks for  Offset Printing  is to be done carefully as recommended by the suppliers of those inks.  Generally the metallic inks are made with metal particles like Copper, Silver, Aluminium, zinc, Gold and Bronze. The metallic inks are used for printing Business Cards, Advertisement material,  Invitation cards, Saree and other Product packages.  The metallic inks best suit printing on the coated stocks.

Click the following link and read interesting tips on printing with metallic inks. 
The metallic inks are best suited  for printing by Screen printing process. Otherwise all the metallic inks have good coverage and dries with absorption and oxidation process. The setting of ink does not differ from conventional inks. The disadvantage on the use of   metallic inks are that they are opaque in nature unlike conventional process inks which are transparent based,  and therefore can not be used like three or four color process inks to generate multi color images by super imposing one on top of  other. When metallic inks are used over large areas, varnishing the sheet or giving some form of aqueous coating is recommended to protect it against scratching and rubbing off from the surface. Always as a rule the printing with metallic inks is done after all other colors are printed to retain the glossy effect.
16. MSDS : MSDS means Material Safety Data Sheet. Incorporating the MSDS certificate with the chemical supplies is one of the mandatory requirements in many countries. MSDS contain information about the potential hazards of the  chemical supplied and the precaution and protection information for safety purposes. The MSDS certificate informs about the toxicity, use, storage and handling conditions besides emergency procedures in case of mishaps which may occur while handling or exposed to such products. The purpose of MSDS therefore  is to instruct and inform the handler of the chemical about proper and safe handling.
The MSDS sheet normally contain  the following information:
a. Manufacturer and suppliers names, addresses, and emergency phone numbers
b. Physical data of the product
c. Explosion or fire hazard data
d. Hazardous ingredients in the product
e. Toxicological properties
f. First aid measures in case of accidents with the said product etc 
............Additions to alphabet M to be continued under M/3

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