Paper Choosing the "right" paper is no easy task. A classification helps: paper is a fascinating printing material. It is versatile and an ideal information carrier. In order to meet different requirements, there are different types of paper, which are classified by the paper industry according to their areas of application.Five areasThe first group includes newsprint, which is usually processed from rolls into newspapers or inserts.
Graphic papers are probably the most important category. This category, which in turn can be divided into two areas, includes all printing and writing papers as well as multifunctional preprint papers. The latter can be pre-printed with the company logo and other information in offset printing and are then used on all kinds of modern office communication devices.
Another group comprises paper, cardboard and paperboard for the huge field of packaging. Cardboard and paperboard are mainly used in packaging companies for the production of folding carton packaging or in bookbinderies.
The fourth area is made up of papers for modern office communication in service and industrial companies, but also for private customers. These paper qualities are also known as office papers. The segment mainly comprises white, but also colored uncoated papers. Office papers are specially designed for multifunctional use in the office. Multifunctional papers are suitable for writing on and printing with laser and inkjet printers or for copying, for example.
Another segment is hygiene paper. This segment includes toilet paper, kitchen towels, handkerchiefs, cosmetic tissues, towel paper, etc.
Finally, a less significant group comprises paper and cardboard for special technical applications.
Paper qualitiesThe quality of graphic papers differs primarily in terms of the composition of the pulp, the surface texture and the color. We talk about wood-free paper when the paper raw material contains no groundwood pulp, i.e. consists of cellulose or rags. Cellulose is the fiber obtained from the wood, which is completely cleaned of all impurities, in technical terms lignin and incrustations. This paper quality is offered uncoated and coated.
Wood-containing grades with a coating on both sides are widely used. These coated papers are mainly used in web offset or gravure printing processes. Depending on the grammage, these are also referred to as LWC and ULWC papers (see box). LWC and ULWC papers are used for high-volume magazines and catalogs.
Wood-containing papers are also used uncoated on a large scale, especially for periodicals. They are often used where a thin paper is required that also has a natural feel. Wood-containing papers are more opaque than wood-free papers with the same grammage. However, they have the disadvantage that they are not resistant to ageing.
Paper and the environmentPaper producers have done a great deal in the past to improve their once tarnished image. For example, bleaching pulp with chlorine is a thing of the past, and closed water cycles and wastewater treatment plants have become a matter of course.
Today, the paper manufacturing industry is also taking a responsible approach to the environment when it comes to wood as a raw material. One well-known example is recycled paper. These papers are made from 100% household waste or pre-consumer waste (waste from the printing and paper industry) and are labeled accordingly. Manufacturers are allowed to use the term recycled paper if the paper contains 80 percent waste paper and thus 20 percent virgin fibers.
The two labels FSC (Forest Stewardship Council) and PEFC (Program for Endorsement of Forest Certification Schemes) are becoming increasingly popular. These two labels indicate the sustainable management of wood as a raw material. PEFC differs from FSC in that PEFC certification is used in countries where the forests are mainly privately owned. The PEFC label is therefore very widespread in Scandinavia. The COC (Chain of Custody) suffix on both labels is an indication of the controlled product manufacturing chain. This proof can be used to prove that the raw material wood for the end product bearing the label - e.g. printed matter, furniture, packaging, etc. - actually comes from PEFC- or FSC-certified forests. Only if these conditions are met by the paper processing industry - and if the customer so wishes - may the corresponding label be printed.
All companies involved in the production, distribution and processing of such papers must also be certified. If this label is used by printing companies, this is an indication that they fulfill the various requirements of the label. To this end, the paper or cardboard in the company must be labeled and the entire flow of goods must be traceable and verifiable; after all, the sustainable production of a paper cannot otherwise be determined.
Creative or designer papers are the salt in the (paper) soup. In addition to the designer, they also make the customer's heart beat faster.
The broad field of creative papers is very difficult to define. Creative papers can have special surface textures and create a different haptic impression - or they stand out due to their color. Creative papers are used, for example, for high-quality, elegant-looking business stationery or for textured invitation cards. Creative cardboard is also used in the packaging segment for luxury packaging and the like. Although a niche product in terms of volume, it is this segment in particular that continues to cause a stir in the paper sector. The paper collections of leading manufacturers such as Arjo Wiggins, Gmund, Lake Paper (offshoot of Gmund) and Thibierge & Comar (part of Arjo Wiggins) are hard to resist for anyone interested in paper.
Format, grammage, volumeNot every paper can be used "sensibly" in every format. This fact has to do with the direction in which the paper runs during paper production (the paper fibers always arrange themselves in the direction of the wire on the paper machine). After the necessary separation of the paper into either smaller and therefore more manageable paper rolls or the cutting to raw or final formats, and due to the fact that the running direction is decisive for the further processing of certain printed products, certain printed matter formats are more or less suitable. Better utilization of the sheet and therefore less waste ultimately make production more cost-effective. For large orders (from approx. 2 tons), paper mills also produce individual formats to compensate for any format-related disadvantages.
Common raw sheet formats for the so-called consumer grades are 72 ¥ 102, 70 ¥ 100, 64 ¥ 92, 46 ¥ 62 or 50 ¥ 70 cm - in both directions (narrow and wide web). In addition to the format and paper quality, other important parameters when evaluating a paper for a job are the grammage. The basis weight or grammage (sometimes colloquially referred to as "gram weight") of a paper is defined in grams per square meter. And because the grammage refers to one square meter, it is easy to calculate how heavy a 16-page brochure will be. If the end product is in DIN format, the (rough) calculation is even easier. Since the A0 format (841 ¥ 1189 mm) corresponds almost exactly to one square meter, you can quickly calculate the weight. An example for calculating the total weight of a 16-page brochure that is to be produced with 80 g/m2 paper: One sheet of DIN A0 = 80 g/m2. I.e: A1 = 40 g, A2 = 20 g, A3 = 10 g, A4 = 5 g. The 16-page A4 sheet will therefore weigh 8 (sheets) ¥ 5 = 40 g.
From newsprint to mirror-gloss paperThe grammage of a paper has a significant influence on the overall costs when choosing paper, as the price of the paper on the one hand and any increased postage costs on the other can increase the unit price of a printed product sent out. Another criterion when choosing paper is the volume. In mathematical terms, volume is a spatial quantity. It defines the ratio of the paper cross-section (its thickness) to the paper weight. An example: A single-volume, 80 g/m2 paper has a thickness of 0.08 mm (or 80 m); a double-volume paper is 0.16 mm thick as 80 g/m2 paper and therefore twice as thick for the same weight. Higher-volume papers are therefore always suitable when a paper with a good grip is required and weight has to be saved.
Another, and indeed the most important, criterion when choosing paper is the paper quality. The paper industry produces different paper qualities to meet the various needs of the graphic arts industry. These qualities differ on the one hand in the composition of the paper and on the other hand in the paper finishing downstream of paper production. The most important parameter in the composition is the raw material used. This ranges from (not necessarily completely) wood-free paper to recycled paper and paper interspersed with waste paper, through to grades to which rags or other materials have been added. Stiffness, opacity, foldability, whiteness, resistance to ageing and, ultimately, price are the key parameters when choosing the "right paper". Papers with a high wood content and a high proportion of waste paper are mostly used for short-lived products such as daily newspapers or for newspaper printing. The high proportion of waste paper makes a high whiteness impossible and the high proportion of wood causes the paper to yellow more quickly. On the other hand, the paper is very ecological, inexpensive and still has good opacity.
The satin finish and/or coating turns papers into high-quality substrates. This quality is often referred to as premium paper and is often chosen for higher-quality magazines (magazine printing) or for the production of corresponding printed matter. Depending on taste and use, matt, semi-matt or glossy papers are available coated or uncoated.
Apart from the creative papers, the top of the paper pyramid is occupied by cast-coated papers. The gloss of this quality, also known as mirror-gloss paper, is created by the special coating process, which uses highly polished steel cylinders and heat to make the already applied and satinized coating shine.
Natural papers have established themselves between the newsprint and premium papers. This uncoated paper quality has no coating, but has a very high-quality pulp composition. Uncoated papers are therefore also referred to as uncoated papers.
Paper needs advicePaper is a product that requires a lot of advice - even the most discerning paper buyer finds it difficult to choose from the large selection. And: the more special the paper is supposed to be, the more advice is required.
Paper advice from the print shop is a huge opportunity for them to stand out. This is where the experience of the printers or customer advisors, who have the necessary practical experience, comes into play. However, according to paper wholesalers, many print shops just want to make things easy for themselves and shy away from the effort of testing an "exceptional" paper. It is therefore also up to the persistence of the agency or the print buyer to make their wishes known and to enforce them.
The sales advisors at paper wholesalers also offer great support in selecting the right paper for printed matter. In addition, paper producers also offer assistance to help printers achieve good results. In its customer magazine Paper Now, the Finnish paper manufacturer writes that although capturing and separating images is obviously becoming increasingly commonplace, the paper parameters are unfortunately often not taken into account. The company thus emphasizes the importance of adapting the litho to the paper. Paper manufacturer Sappi provides digital brochures on technical printing problems on its website in the Knowledge Bank section (which are of course also available in a version printed on paper). M-real, a manufacturer of high-quality paper qualities, and Arctic Paper, a paper producer specializing in uncoated paper, even provide ICC profiles for download and/or guidelines for the "correct" handling of their papers. In addition to information on grammages and available formats, the paper collections of most suppliers often also contain a lot of technical printing information.
Jürgen Franck
Paper consumption in SwitzerlandSwiss paper producers
have been successful in exporting paper for years. With the exception of packaging paper and cardboard, more paper is exported than imported. As a result, paper producers had good capacity utilization last year. However, since 2001
consumption in Switzerland. In its 2005 annual report, the ZPK (Association of the Swiss Pulp, Paper and Cardboard Industry) writes: "It is becoming apparent that demand for paper has reached a maximum. Switzerland is a saturated economy in terms of paper consumption (less so for cardboard, as this is used for packaging goods)." (jf)Terms from A to Z Waste paper:
Paper waste designated as waste paper can be used for the production of recycled paper and other products made from paper or for cardboard, etc. Handmade paper:
Handmade paper without running direction; characterized by an irregular stock thickness and irregular edges.thin printing paper/Bible printing paper:
Strong, thin and opaque printing paper; particularly suitable for the production of large, yet thin books.continuous paper:
Not really continuous, mostly wood-free roll printing paper for continuous printing machines (form printing); usual grammages: between 40 and 80 g/m2.label paper:
Especially suitable for label production; important properties include wet strength, curl and tear resistance:
High-quality, double-sided coated paper for demanding, color printing work; has a mostly glossy, very even and smooth (also smooth and semi-matt) surface. Ideal for reproducing images with the finest halftone screens.offset paper:
Fully glued, machine-smooth, non-picking and non-dusting paper.poster/affiche paper:
Wood-free, wet-strength and fully glued uncoated paper; has special properties that allow soaking prior to posting and gluing.Text & cover paper:
A term taken from the American term for high-quality, uncoated, approx. 100 to 320 g/m2 heavyweight fine papers in white or color; usually characterized by felt-marked or embossed exclusive surface structures:
Soft, elastic, machine-smooth paper with a well-sealed surface; mainly used for printing books. (jf)