Drug testing

Why There Are Color Differences in Printing from Your PC

This article describes the basic properties of color, what the relationships are between them and the differences between what you see and what you actually get using your inkjet cartridges.

Properties

Most of you will have come across these three; Hue, Saturation and Brightness; if you have ever messed around with color settings of your images.

Hue: For example; blue, green and violet are all hues. They are colors. The dictionary definition of 'Hue' is; "the attributes of colors that permits them to be classed as red, yellow, green, blue or an intermediate between any adjacent pair of these colors."

Saturation: This refers to how vivid the color is. The higher the amount of gray relative to the amount of hue, the less vivid it will be.

Brightness: Relates to the relative darkness or lightness of the color.

In 1905 American artist A. Munsell published a color measurement system, naming the three parameters, Hue, Value and Chroma (Hue, Saturation and Brightness as above). This three dimensional relationship resulted in color identification in this format, for example; 7.5YR 7/12. Here we have a yellow-red hue tending with a value of 7 and a chroma of 12. There are 40 pages in the book covering all colors in the complete Munsell system.

Monitor and printer color production

Printer

Printer colors are produced from inkjet cartridges emitting minute patterns of ink dots placed on paper. All colors that you see come from just four colors; cyan (C), magenta (M), yellow (Y) and black (K).

As an aside, a mixture of cyan, magenta and yellow should produce black, but in reality a touch of black is needed to get it.

Monitor

A phosphor is a substance that emits light when subjected to radiation. Color phosphors are illuminated with electrons in your monitor and hence images are produced. There are three colored phosphors in each pixel on the screen; red (R), green (G) and blue (B).

Monitor and printer color differences

As will be aware, the printed output you receive hardly ever matches exactly that seen on your monitor 100% of the time. This is because the way that color is produced is different and the range of colors that are produced is different between the monitor and printer, as described above.

There are ways to get a closer match. You can experiment with printer driver settings or use image editing/color management software to help match up the two.

Printing Process

Most inkjet printers can't produce variations of the three primary colors so they employ a process called 'halftoning' to represent the thousands of colors needed. The two methods used for this are 'Dithering' and 'Error Diffusion'.

With 'dithering', different colored ink dots are aligned to give the appearance of neutral colors...suitable for large areas of color such as in graphs and bar charts. There are often additional settings such as 'Coarse Dithering'...for images with limited detail and shading, and 'Fine Dithering' for images with significant amount of detail.

With 'error diffusion' inkjet cartridge dots are merged with surrounding color dots to produce natural colors with the possibility of subtle color gradation. Ideal for detailed images or photos.

If there is only text to print then 'No Halftoning' should be selected.

When scanning, be aware that it will be more difficult to get a good match because the scanner will make the image using the CMYK data format, then RGB on the monitor and finally changed again to the CMYK data format via the printer.

This article may be reproduced in its entirety provided the resource paragraph below is included and all urls kept active.

(c) Paul Curran, CEO of Cuzcom Internet Publishing Group and webmaster at this cheap ink cartridge & laser toner store, providing discounted brand name compatible ink cartridge and laser toner supplies. Sign up for the feed on our web site or the blog showcasing the products.

In The News:

Last week, marine experts at Seaside Aquarium fielded a call about a bizarre sea creature found buried in the sand at a beach in Long Beach, Washington.
Two Bronze Age women — one likely a teenage priestess — probably didn't travel far and wide across Europe, as previous research suggested, but instead were real homebodies who likely never left what is now modern-day Denmark, a new study finds.
It's the moment warm weather fans have been waiting for: the first day of spring has officially arrived in the Northern Hemisphere.
Dinosaurs and alligators may both be reptiles, but the similarities were thought to be few and far between. Dinosaurs are commonly thought to have been warm-blooded, while alligators are cold-blooded, meaning they can not regulate their own body temperatures. Now, a new study suggests that both dinosaurs and animals have more in common than previously thought – their ability to hear.
Rep. Alexandria Ocasio-Cortez, while selling her "Green New Deal", said that the world will end in 12 years if nothing is done to address climate change.
Formula One champion Lewis Hamilton repeated a long-held conspiracy theory during a visit to NASA's Johnson Space Center in Houston last week.  
For some creatures, the magnetic field that hugs our planet serves as a compass for navigation or orientation.
An astronomer at Columbia University has a new guess about how hypothetical alien civilizations might be invisibly navigating our galaxy: Firing lasers at binary black holes (twin black holes that orbit each other).
Skygazers are set for a treat this week when the third and final supermoon of the year occurs.
Four human herpes viruses have been found to reactivate in astronauts on Space Shuttle and International Space Station missions, according to new research by NASA.

A Beginners Guide to Avoiding Viruses

"Aaaaaahhhhhh! I've been invaded by a virus!" Getting a virus... Read More

Why Using an Ad Blocker Can be a Bad Idea

Ad Blocking is getting to be a common sport on... Read More

The Best MP3 Players Under $100

You don't have to fork out $250 for a super-diggy-whizbang... Read More

Your Home is in Your Hands

I would like to tell you about a magic home.... Read More

What Has A Portable MP3 Player Have To Do With Your Business

Plenty! When we made the decision to be our own... Read More

If You are the Only User on Your Windows XP Computer, Do You Think One User Account Is Enough?

I am going to assume that you are running windows... Read More

Connect Your IPAQ to Linux

Choose Not To ConformPalm pilots and pdas are constantly growing... Read More

HTML Explained: Part 2

Get started creating web pages using text files and HTML... Read More

iPod users get the picture

iPod users start to get the picture and it's turning... Read More

Mail-merging: The Principles

About mail-mergingMail-merging is the process of merging variable data and... Read More

Plasma TV vs LCD TV

For those seeking to buy their first flat panel TV... Read More

Palm PC critique

I met an entrepreneur who hole heartedly disagree with an... Read More

Portable Technology: Getting to Know the Treo

Up until the recent past, those who wanted to take... Read More

Flash Memory, Part I: MMC and SD

MMC and SDFlash memory is available in so many formats... Read More

How Does a Palm Pilot Work?

Just The Facts, Ma'mPalm pilots are all the rage now.... Read More

How to Set Up Simple File Sharing WinXP

The first step is: Start > My DocumentsSo you have... Read More

The Many Benefits of Owning a DVR

Has This Ever Happened To You? OK.. it's Friday night,... Read More

DVD The Ultimate Consumer Digital Media

Digital Video Disc or as it is sometimes referred to... Read More

How to Use SQLXML to Retrieve Data from SQL Server Database?

Using SQL Server 2000 and above versions you can retrieve... Read More

Put Order and Information into File Names

Unless you place your faith in internal search engine software... Read More

The Advantages of Portable MP3 Players

With their solid-state technology, compact size, and abundant memory, portable... Read More

Dont Let the Internet Overstimulate Your Mind

The Internet is an awesome tool, but be careful and... Read More

Cisco CCNA / CCNP Certification: OSPF ASBRs Explained And Illustrated

When I first started studying for my CCNP, some of... Read More

System File Checker - A Maintenance Utility

System File Checker is a great utility that is typically... Read More

Linux Power Tools - Great Tools to Make System Administration Easy

World War II - Germany decided to attack Poland. Poland... Read More

garage lights street light music Pete's produce ..