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Flexographic Printing – High Throughput Technology for Fine Line Seed Layer Printing on Silicon Solar Cells
Presented at the 28th European PV Solar Energy Conference and Exhibition, 30 September – 04 October 2013, Paris, France FLEXOGRAPHIC PRINTING – HIGH THROUGHPUT TECHNOLOGY FOR FINE LINE SEED LAYER PRINTING ON SILICON SOLAR CELLS Andreas Lorenz1, Andre Kalio1, Gunter Tobias Hofmeister1, Sebastian Nold1, Lorenz Friedrich1, Achim Kraft1, Jonas Bartsch1, Dietmar Wolf2, Martin Dreher2, Florian Clement1, Daniel Biro1 1Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstr. 2, 79110 Freiburg, Germany 2Deutschsprachiges Flexodruck-Technologiezentrum DFTA-TZ, Nobelstraße 10, 70569 Stuttgart, Germany Phone: +49 761 4588 5299, email: [email protected] ABSTRACT: Within this work, seed layer grids for solar cell front side metallization were applied using flexographic printing which represents an innovative, high-throughput approach for solar cell front side metallization. Fine line seed layer contact grids with a silver consumption lower than 10 mg per cell could be realized on alkaline textured Czochralski-grown silicon wafers with an edge length of 156 mm. Subsequently, the seed layer has been reinforced with silver using light induced plating (LIP). In order to determine the optimum LIP process, three groups were plated with different amounts of silver deposition. The results were analyzed before and after plating regarding silver consumption, contact finger geometry and interruptions. Solar cell parameters were determined after plating. It was demonstrated, that a homogeneous front side seed layer metallization without interruptions down to a line width of 25 µm can be realized using flexographic printing. The best cell reached a conversion efficiency of 18 % after silver LIP which is comparable to standard screen printed cells on the used Si wafer material. -
Image Carrier Poster
55899-11_MOP_nwsltr_poster_Winter11_v2_Layout 1 2/11/11 2:25 PM Page 1 The Museum of Printing, North Andover, MA and the Image Carrier www.museumofprinting.org Relief printing Wood cuts and wood engravings pre-dated moveable type. Called “xylographic printing,” it was used before Gutenberg for illustrations, playing cards, and small documents. Moveable type allowed corrections and editing. A wood engraving uses the end grain, where a wood cut uses the plank grain. Polymer plates are made from digital files which drive special engraving machines to produce relief plates. These plates are popular with many of today’s letterpress printers who produce invitations, and collectible prints. Metal relief cylinders were used to print repetitive designs, such as those on wrap - ping paper and wall paper. In the 1930s, the invention of cellophane led to the development of the anilox roller and flexographic printing. Today, flexography prints most of the flexible packaging film which accounts for about half of all packaged products. Hobbyists, artists, and printmakers cut away non-printing areas on sheets of linoleum to create relief surfaces. Wood cut Wood engraving and Metal plate Relief cylinder Flexographic plate Linoleum cut Foundry type began with Gutenberg and evolved through Jenson, Garamond, Moveable type Caslon and many others. Garamond was the first printer to cast type that was sold to other printers. By the 1880s there were almost 80 foundries in the U.S. One newspaper could keep one foundry in business. Machine typesetting changed the status quo and the Linotype had an almost immediate effect on type foundries. Twenty-three foundries formed American Type Founders in 1890. -
Other Printing Methods
FLEXO vs. OTHER PRINTING METHODS Web: www.luminite.com Phone: 888-545-2270 As the printing industry moves forward into 2020 and beyond, let’s take a fresh look at the technology available, how flexo has changed to meet consumer demand, and how 5 other popular printing methods compare. CONTENTS ● A History of Flexo Printing ● How Flexo Printing Works ● How Litho Printing Works ● How Digital Printing Works ● How Gravure Printing Works ● How Offset Printing Works ● What is Screen Printing? ● Corrugated Printing Considerations ● Flexo Hybrid Presses ● Ready to Get Started with Flexo? 2 A History of Flexo Printing The basic process of flexography dates back to the late 19th century. It was not nearly as refined, precise, or versatile as the flexo process today -- and can be best described as a high-tech method of rubber stamping. Printing capabilities were limited to very basic materials and designs, with other printing methods greatly outshining flexo. Over the past few decades flexo technology has continuously evolved. This is largely thanks to the integration of Direct Laser Engraving technology, advancements in image carrier materials, and in press technologies. These innovations, among others, have led to increased quality and precision in flexo products. These technological improvements have positioned flexography at the helm of consumer product and flexible packaging printing. Flexo is growing in popularity in a variety of other industries, too, including medical and pharmaceutical; school, home, and office products; and even publishing. How Flexo Printing Works Flexo typically utilizes an elastomer or polymer image carrier such as sleeves, cylinders, and plates. The image carrier is engraved or imaged to create the design for the final desired product. -
Printing Industry Is the Large Proportion of Very Small Firms
The printing sector is a diversified industry sector composed of firms who perform printing as well as firms who render services for the printing trade, such as platemaking and bookbinding. One of the most significant characteristics of the printing industry is the large proportion of very small firms. The Census Bureau reported that in 2002 nearly half of the 37,538 printing companies had fewer than five employees; approximately 80 percent employed fewer than 20 workers. Processes used in printing include a variety of methods used to transfer an image from a plate, screen, film, or computer file to some medium, such as paper, plastics, metal, textile articles, or wood. The most prominent of these methods is to transfer the image from a plate or screen to the medium (lithographic, gravure, screen, and flexographic printing). A rapidly growing new technology uses a computer file to directly "drive" the printing mechanism to create the image and new electrostatic and other types of equipment (digital or nonimpact printing). Four Main Segments The printing industry can be separated into four main segments: Lithography Flexography Gravure Screen printing Lithography Lithography is a planographic printing system where the image and non-image areas are chemically differentiated with the image area being oil receptive and non-image area water receptive. Ink film from the lithographic plate is transferred to an intermediary surface called a blanket, which, in turn, transfers the ink film to the substrate. Fountain solution is applied to maintain the hydrophilic properties of the non-image area. Ink drying is divided into heatset and non- heatset. -
I. INTRODUCTION and BACKGROUND the Printing Industry Is One of the Largest Manufacturing Industries in the United States
I. INTRODUCTION AND BACKGROUND The printing industry is one of the largest manufacturing industries in the United States. The industry is dominated by small and medium-sized businesses, most of them with fewer than 20 employees. In 2002, according to the Bureau of Census, approximately 83 percent of the screen printing industry was comprised of small businesses. The Info USA Power Business Database estimates the number of screen printers in 2002 in the U.S. at 16,341. California has 1,886 screen printing establishments. Volatile Organic Compound (VOC) emissions from solvent cleaning operations contribute significantly to the South Coast Air Basin’s emission inventory. The South Coast Air Quality Management District (SCAQMD or District) periodically adopts an Air Quality Management Plan (AQMP). This AQMP calls for significant reductions in VOC emissions from cleaning and degreasing operations by 2010 to achieve attainment status. The SCAQMD regulates VOC emissions from businesses located in the four county area including Los Angeles County, Orange County, San Bernardino County and Riverside County. One of the SCAQMD rules, Rule 1171 “Solvent Cleaning Operations,” regulates the VOC content of screen printing cleanup solvents. The VOC content of screen printing cleanup solvents is currently set at 500 grams per liter. The District plans to reduce the allowed VOC content to 100 grams per liter on July 1, 2006. Lowering the VOC content to 100 grams per liter would reduce emissions of these solvents by about 1.3 tons per day. By July 1, 2006, screen printers in southern California must convert to alternative low-VOC cleanup materials. -
Introduction to Printing Technologies
Edited with the trial version of Foxit Advanced PDF Editor To remove this notice, visit: www.foxitsoftware.com/shopping Introduction to Printing Technologies Study Material for Students : Introduction to Printing Technologies CAREER OPPORTUNITIES IN MEDIA WORLD Mass communication and Journalism is institutionalized and source specific. Itfunctions through well-organized professionals and has an ever increasing interlace. Mass media has a global availability and it has converted the whole world in to a global village. A qualified journalism professional can take up a job of educating, entertaining, informing, persuading, interpreting, and guiding. Working in print media offers the opportunities to be a news reporter, news presenter, an editor, a feature writer, a photojournalist, etc. Electronic media offers great opportunities of being a news reporter, news editor, newsreader, programme host, interviewer, cameraman,Edited with theproducer, trial version of Foxit Advanced PDF Editor director, etc. To remove this notice, visit: www.foxitsoftware.com/shopping Other titles of Mass Communication and Journalism professionals are script writer, production assistant, technical director, floor manager, lighting director, scenic director, coordinator, creative director, advertiser, media planner, media consultant, public relation officer, counselor, front office executive, event manager and others. 2 : Introduction to Printing Technologies INTRODUCTION The book introduces the students to fundamentals of printing. Today printing technology is a part of our everyday life. It is all around us. T h e history and origin of printing technology are also discussed in the book. Students of mass communication will also learn about t h e different types of printing and typography in this book. The book will also make a comparison between Traditional Printing Vs Modern Typography. -
Printing Presses in the Graphic Arts Collection
Printing Presses in the Graphic Arts Collection THE NATIONAL MUSEUM OF AMERICAN HISTORY 1996 This page blank Printing Presses in the Graphic Arts Collection PRINTING, EMBOSSING, STAMPING AND DUPLICATING DEVICES Elizabeth M. Harris THE NATIONAL MUSEUM OF AMERICAN HISTORY, SMITHSONIAN INSTITUTION WASHINGTON D.C. 1996 Copies of this catalog may be obtained from the Graphic Arts Office, NMAH 5703, Smithsonian Institution, Washington D.C. 20560 Contents Type presses wooden hand presses 7 iron hand presses 18 platen jobbers 29 card and tabletop presses 37 galley proof and hand cylinder presses 47 printing machines 50 Lithographic presses 55 Copperplate presses 61 Braille printers 64 Copying devices, stamps 68 Index 75 This page blank Introduction This catalog covers printing apparatus from presses to rubber stamps, as well as some documentary material relating to presses, in the Graphic Arts Collection of the National Museum of American History. Not listed here are presses outside the accessioned collections, such as two Vandercook proof presses (a Model 4T and a Universal III) that are now earning an honest living in the office printing shop. At some future time, no doubt, they too will be retired into the collections. The Division of Graphic Arts was established in 1886 as a special kind of print collection with the purpose of representing “art as an industry.” For many years collecting was centered around prints, together with the plates and tools that made them. Not until the middle of the twentieth century did the Division begin to collect printing presses systematically. Even more recently, the scope of collecting has been broadened to include printing type and type-making apparatus. -
Corrugated 101! ! !Corrugated Vs
Corrugated 101! ! !Corrugated vs. Cardboard! • The term "cardboard box" is commonly misused when referring to a corrugated box. The correct technical term is "corrugated fiberboard carton.”! • Cardboard boxes are really chipboard boxes, and used primarily for packaging lightweight products, such as cereal or board games.! • Corrugated fiberboard boxes are widely utilized in retail packaging, shipping cartons, product displays and many other applications ! requiring lightweight, but sturdy materials.! !Corrugated Composition! Corrugated fiberboard is comprised of linerboard and heavy paper medium. Linerboard is the flat, outer surface that adheres to the medium. The medium is the wavy, fluted paper between the liners. Both are made of a special kind of heavy paper called !containerboard. Board strength will vary depending on the various linerboard and medium combinations.! • Single Face: Medium glued to 1 linerboard; flutes exposed! • Single Wall: Medium between 2 liners! • Double Wall: Varying mediums layered between 3 liners! !• Triple Wall: Varying mediums layered between 4 liners! !Flute Facts! !Corrugated board can be created with several different flute profiles. The five most common flute profiles are:! • A-Flute: Original corrugated flute design. Contains about 33 flutes per foot.! • B-Flute: Developed primarily for packaging canned goods. Contains about 47 flutes per foot and measures 1/8" thick! • C-Flute: Commonly used for shipping cartons. Contains about 39 flutes per foot and measures 5/32" thick! • E-Flute: Contains about 90 flutes per foot and measures 1/16" thick! • F-Flute: Developed for small retail packaging. Contains about 125 flutes per foot and measures 1/32" thick! • Generally, larger flute profiles deliver greater vertical compression strength and cushioning. -
Manufacturing of Paperboard and Corrugated Board Packages
Lecture 9: Manufacturing of paperboard and corrugated board packages Converting operations: printing, die-cutting, folding, gluing, deep-drawing After lecture 9 you should be able to • describe the most important converting operations in paper and paperboard package manufacturing • discuss important runnability considerations in paperboard package handling • relate factors affecting runnability to pppaperboard app earance and pyphysical performance quality parameters 1 Literature • Pulp and Paper Chemistry and Technology - Volume 4, Paper Products Physics and Technology, Chapter 10 • Paperboard Reference Manual, p. 157-225 • Fundamentals of packaging technology Chapters 4, 6, 15 and 18 Paperboard Packaging Design is the result of • Personal creativity plus – Knowledge and understanding of packaging materials, including: • Structural properties • Graphic capabilities • Converting processes and converting properties • Customer packaging systems • Marketing objectives • Distribution requirements • Retail outlet expectations • Needs and desires of end user • How end user will use the product • Many people may contribute to the design 2 Overall, the design must provide: • Containment of product • Protection of product • Ease in handling through distribution • Prevention of product spoilage • Tamper evidence • Consumer convenience • Brand identification • Communications for the consumer: – Instructions for product use – Coding for quality assurance, expiration dates – Dietary and nutritional information The design should consider: 1. Converting -
Continuous Improvement Efforts in J. Carrol's Screen Printing Process
Continuous Improvement Efforts in J. Carroll’s Screen Printing Process By Millan Arellano A Senior Project Submitted in fulfillment of the requirements for the degree of Bachelors of Science in Industrial Engineering California State University San Luis Obispo Graded by:_____________________Date of Submission_____________________ Table of Contents TABLES AND FIGURES ............................................................................................................................................ 3 ABSTRACT .............................................................................................................................................................. 4 EXECUTIVE SUMMARY ........................................................................................................................................... 4 INTRODUCTION ..................................................................................................................................................... 5 BACKGROUND ....................................................................................................................................................... 6 LITERATURE REVIEW .............................................................................................................................................. 8 DESIGN ................................................................................................................................................................ 15 OVERALL APPROACH ................................................................................................................................................... -
4. Printing and Converting Performance
4. Printing and converting performance Paperboard converting 147 Clean edges and surfaces 155 Handling paperboard 158 Offset lithography 160 UV-offset 161 Waterless offset 162 Hybrid offset 162 Flexography 163 Screen printing 164 Digital printing 165 Gravure printing 166 Hot foil stamping 169 Embossing 171 Die-cutting & creasing 174 Lasercutting 178 Scoring 182 Creasabilty & foldability 186 Gluing 194 Binding in practice - the last link 199 Heat sealing 206 Packaging operation 203 Deep drawing 212 146 Reference Manual | IGGESUND PAPERBOARD Paperboard converting Paperboard converting Paperboard has the ability to achieve or exceed the same The increasing demands in the brand promotion process excellent image reproduction as for the best fine papers. for graphic design and the use of non-print surface enhance- Paperboard offers equal possibilities to achieve new, ment are creating innovative shapes and multi-sensory ex- challenging shapes as competing packaging materials. periences for the consumer or user who hand les the product. However, increasing demands on performance of the An understanding of the interaction between paper- material in various converting processes have become board properties and converting effi ciency is essential for evident when speeds in both printing processes and post- designers and converters, since the ultimate design of the press converting have increased. Additionally, the accept- product together with the choice of paperboard will impact ance level for impurities or slight deviations in quality in the on crucial conversion factors like printability, fl atness, and fi nal product has dropped noticeably as a result of both creasing/folding properties. Considering all the variables, end-user demands and the use of modern quality control it is probably true to say that consistency in the behaviour equipment in the various converting machines. -
ARTWORK Guidelines for Medical Packaging Graphic Design
6153C West Mulford St. Niles, IL 60714 USA Our Quality, Our Performace, Toll Free Phone: 855-966-6100 Fax: 847-966-6168 Your Success. peelmaster.com ARTWORK Guidelines for Medical Packaging Graphic Design • Background • Print in the heat seal area – Avoid if possible • Close registration and “traps” – Discouraged, but possible • Screens and halftones – Recommended screen: 80 line; gradients/vignettes discouraged • Small type – 6 pt. or larger recommended • Color specifications – Use Pantone uncoated for paper, Tyvek®; Pantone coated for films • Large solids – Large solid area of print are discouraged • Metallic Inks – Discouraged, and may incur extra expense • Electronic artwork – Vector based format (see page 2 for further details) Background: Because medical packaging materials (particularly Tyvek®) can be of uneven thicknesses, there are some limitations on printing that graphic designers should take into consideration when designing artwork for medical packaging. PeelMaster is one of the best printers in the medical packaging business, and can provide expert assistance in your design process. No matter what the challenge, we will give our best efforts. However, often it is possible to reduce or eliminate potential problems with proper design in the first place. For this reason, to assist you, we have assembled the following guidelines: 1. PeelMaster uses a web-fed (roll-to-roll) flexographic printing process. 2. We can print up to 4 colors in register on one side of the web, or can print in register on both sides, 2 colors on one side, one color on the other. (Note: Most medical packaging is one or two colors. If more colors are needed, up to 4 colors can be printed on each side of the web–in two print passes–but the image on one side will randomly located on the package.) 3.