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home > Tips & Tutorials > Prepress / Printing > HALFTONES : DITHERING : LINE ART


DITHERING : HALFTONES SCREENS & LINE ART : HALFTONING, RESOLUTION AND PREPRESS

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GRAPHIC DESIGNERS FROM OUR GRAPHIC DESIGN COMMUNITY

 
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A Six-Color Cure For Screen-Printed Halftones, Part 1 - Theory and explanation of six-color printing process, graphics printing

Digital Halftoning - This site was first posted to advertise the halftoning research that I was doing while part of the University of Delaware's Department of Electrical Engineering. Now that I am at the University of Kentucky, we can all look forward to my long and succesful career in halftoning and printing research...

Dithering - Full-color photographs may contain an almost infinite range of color values. Dithering is the most common means of reducing the color range of images down to the 256 (or fewer) colors seen in 8-bit GIF images.

Drawing with Photoshop Halftones - This image that will be used for the cover of a bimonthly newsletter going to orthodontist, was done by converting sections of grayscale tones into line halftones.

Halftones - The basics of color and black & white halftones. Halftone images contain a series of dots in a specific pattern that simulate the look of a continuous tone image. Because printers cannot print continuous tones — whether it's the many shades of gray in a grayscale image or the millions of colors in a color photograph — you must convert these images to halftones. Another term for halftoning is dithering.

Halftone Screens - Learn about Halftones. The term Halftone Screen refers to the pattern of dots of varying sizes applied to an image of varying tones, or same sized dots applied to a tint of colour, when output to - film for the printing processes - or laser printed artwork etc..

Halftones - White Paper, Black Ink

Halftoning - To many people a printed image is indistinguishable from its photographic counterpart. That so many can be fooled is a testimony to the sophistication of modern printing technology. While a full range of tonal values can be used to generate a photographic print, printers don't have that luxury. There is no gray ink. Ink dots must be arranged and printed so that the illusion of a continuous tone is presented to the viewer.

Halftoning - The Secret Print Ingredient - Tom Arah looks at the crucial role of halftone screening in successful print.

Halftones and Resolution Basics - What Is "Resolution" and How Do I Use It?

Halftones and Line Screens - In offset lithography, the density of CMYK inks can not be varied in continuous fashion across an image, so a range is produced by means of halftoning. In halftoning, tiny translucent CMYK ink dots of variable sizes are printed in overlapping grids. As the dots get smaller, so does the shade of color that is reproduced. Grids are placed at different angles for each of the ink colors. Smaller halftone dots absorb less light; thus, as a result of an increase in the amount of reflected light, apparent density is decreased and the object appears lighter.

Linescreens - The frequency of the halftone dots - their density within a given area - is an important number. In the United States, we measure halftone screens in "lines per inch" or lpi. If the "linescreen" [a.k.a. "screen frequency"] is 100 lpi, then each square inch of a given color will contain 100x100=1,000 halftone dots. Different printing techniques and conditions require different halftone screens (note: these numbers are typical, not hard and fast)

Line Screens for Halftones, Tints and 4/Color Separations - List of Maximum Line Screens as determined by press and paper

More On Halftones: Process Color Halftones And Line Art - How does the printer or imagesetter create a halftone from a color or grayscale image?

Printing Halftones - Printing Halftones and LPI (Lines per Inch)

Scanning Line Art - Three Modes of Scanning Line Art. There are 3 modes of scanning line art: b/w or line art mode (1 bit), grayscale, halftone

Which Style Line Screen Should I Use? - Halftone photography uses a halftone screen or electronic dot generation. The original halftone screen consisted of inked lines on two sheets of optically flat glass cemented together at right angles. The lines were the same width as the spaces.

VISIT PREPARING FILES FOR PRINT / PREPRESS
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Aug 28
Best Cool, Clever & Unique Billboards and Outdoor Advertising Part II
This part II of a never-ending series of the coolest outside ads, billboards, and public advertising.


Aug 26
Best Cool, Clever & Unique Billboards and Outdoor Advertising
Best Clever & Unique Billboards and Outdoor Advertising I have found tons of the coolest billboards, outdoor advertising, and transit ads ever. I am listing many of them today but I have found many others (and I am still searching for more) that I will list soon. I am listing them in a gallery [...]


Aug 24
Logo Design Inspiration - Cool Logos Part II
This is part II of a multiple part series of the coolest logo designs. You can use this list as a source of logo inspiration or just look at it because it is fun to do.


Aug 20
Logo Design Creation Process from Start to Finish by Expert Graphic Designer - Jose Soto
Within this article, I am going to detail the ?six steps? that I took to design the logo for the ?Seventh Congress of Zoos and Aquariums?


Aug 14
Logo Design Inspiration - Cool Logos Part I
I saw some really beautiful logos today so I thought that I would share some with you and then make a series out the idea. This is part I of a multiple part series of the coolest logo designs. You can use this list as a source of logo inspiration or just look at it because it is fun to do. Either way, enjoy the following list of beautiful / cool logo designs.


Aug 12
The Coolest Business Cards - Beautiful & Unique Business Card Designs Part 4
This is the 4th part of our Coolest Business Card series. This time, we are including the printer (when we can find out the information) who printed these business cards.


Jul 22
Logo Design Creation Process from Start to Finish by Expert Graphic Designer - Mark Misenheimer
This article was written by the very talented, Mark Misenheimer of Misenheimer Creative, Inc. Mark is an expert freelance graphic designer who has been in the design business for years. He has documented the design of a logo from start to finish in order to help other graphic designers. I know that you will learn something from this tremendous logo design article.


Jul 17
Getting a Handle on the Creative Process for Graphic Designers
The Graphic Design industry is very competitive, and trust me, it can certainly get stressful and frustrating at times. However, it doesn?t always have to be that way. Here, I have broken down my design process. This is how I create my design layouts from start to finish. Basically, with some focus, structure, and a little bit of talent, creating rewarding and professional design work can be produced more efficiently and with less stress.


Jul 5
20 Ways to Avoid Graphic Designer?s Block
As a designer everyone has experienced a point where they just can no longer think of anything worth while. It?s in these situations when you have to reevaluate your perception of what works and what doesn?t. Use the following 20 tips to avoid and get through a tough designer's block.


Jun 18
Free Online Font Tools - Mega List of Web Based Font, Text, & Type Tools
Graphic Design and Typography are deeply connected. For that reason, I figure that most of you are going to love these free online font and type tools. Most, if not all, of these are very useful and I recommend that you use them when you have a chance. Below you will find the huge list of free browser-based font and type tools.