No one is an expert in every field, and many of us are not experts in technology.  Constantly changing and always moving forward, one can often feel as if he is left behind.  Fortunately, there is always ways to improve upon our knowledge base.  For instance, have you ever wondered what is meant by a dot or pixel?  Ever wondered what the difference is?  Or how one or both might affect your image’s quality? “Dots per inch”, or DPI, is a term that has been around since the invention of the printer, and is a term that is used to describe the amount of ink used per pixel, or the number of ink dots in each pixel.  High DPI equals higher quality image with superior tone, but it also indicated longer print times and more ink expense per print. If ink expense is a concern, lower DPI can help tremendously.  Because DPI is based on two dimensions, halving it will actually produce a quarter of the ink dots made.  For instance, 100 DPI is the equivalent of 10,000 dots per square inch, whereas 50 DPI produces only 2,500 ink dots per square inch. “Pixels per inch”, or PPI, is now a commonly used term.  It has not, though, been a recognized expression for as long as DPI.  PPI is more specific in its meaning, and changing PPI is done primarily to change the size of a printable image.  There are two ways that changing PPI can affect an image.  This is determined by whether a program is set to re-sample or not.  To put it simply, if re-sample is off, proportions are constrained and changing the PPI of an image also changes the width and height of that printable image.  It is important to recall that changing PPI changes the “printable” size, not the on-screen size.  Therefore, there is also the option of using re-sampling.  With re-sample on, changing the PPI will not change the size of the printable image (only the resolution), but lower PPI will appear small on screen.  This is often used for images being uploaded to the internet.  Cameras and scanners produce images at PPI larger than most websites will display.  Using re-sampling and lessening the PPI, creates a more website friendly image, which is also harder for individuals to copy to their own hard drive due to low resolution. While both terms affect resolution and image quality, they do have their own applications and are not exactly interchangeable.  However, do not be surprised to find these terms used incorrectly.  DPI is often used in place of PPI despite the actual difference in definition. Hopefully, this article has helped you gain some insight into the world of digital imagery and you will be inspired to continue your learning quest. For further investigation, you might consider websites like www.smartcomputing.com, or www.suite101.com.  These sites and others like them cater to the beginner and novice crowds.

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Before Bluetooth was invented, there were a number of things that were often difficult to do, including printing in your home from different computers. Most people now have more than one computer in their home – some people have two desktops and two laptops! When Bluetooth technology was invented, companies began to realize that they could utilize this technology in order to make things much easier for homeowners. If you’re interested in making it easier to print from any computer in your house, learning about Bluetooth technology, and how a Bluetooth enabled printer works, is one way to help you to figure out if this technology is for you, and if you can save HP ink cartridges by using this technology.

Range

There are a number of things that most people don’t realize about Bluetooth technology. The first thing is what the range for these printers is. The printers that utilize Bluetooth technology can only work through short range. Having Bluetooth technology means that you can’t be too far away from the printer that you’re trying to print on when you hit the button to print on your computer or else the printer will not recognize that you are trying to contact it. The average range for a printer with Bluetooth technology is anywhere from 30 to 200 feet. If you are further away than 200 feet, you will likely find that your HP ink cartridges have not moved at all and that you don’t get anything printed.

Another thing to learn about Bluetooth printers is that they often have USB ports. These USB ports makes printing much easier. You can, for instance, use Pictbridge in order to make it easier to print things from your cell phone or PDA. Pictbridge is used to translate documents or photos from these items so that the printer can understand what you want it to print. This is a very fun factor of Bluetooth enabled printers and makes many people run through their HP ink cartridges more frequently, as they have many things on their cell phones or their PDA that they would like to have printed.

The Downside

There is one downside to Bluetooth enabled printers, and that is the ability for them to get hacked into. These printers can be hacked into fairly easily, which could cause a number of problems for the average homeowner. One way to keep yourself from being hacked is to make sure that your printer is not set to the discoverable mode. This helps your computer from being seen by other people and helps you to stay safe from hackers who could damage your printer and who could use that printer to connect to your computer which could then cause even more problems.

If you’re interested in making sure that you get the most from your HP ink cartridges, it is best to learn as much as you can about your Bluetooth printers so that you are able to truly enjoy your printer and your ink cartridges.

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