powered by Pro Mach video

Pro Mach Web Site
ProCustomer Industry Leading Aftermarket Support
Allpax Retort Sterilization & Automation Systems
Axon Shrink & Stretch Sleeve Application Systems
Benchmark Food Distribution & Loading Systems
Brenton Case & Tray Packing & Robotic Systems
Currie by Brenton Conventional & Robotic Palletizing Systems
Dekka Case Taping Systems
Edson High Performance Case & Tray Packing Systems
EOL Packaging End of line Applications & Systems
EPI Labelers Flexible Packaging Labeling Systems
Federal Liquid Filling & Capping Systems
Flexible Packaging Flexible Packaging Applications & Systems
FLtecnics Rollstock Pouch Packaging Systems
Greydon Flexible Packaging Coding Systems
ID Technology Labeling, Marking & Coding Systems
Inever Stickpack & Sachet Packaging Systems
IPak Machinery Tray & Bliss Forming Systems
Jalbert Automation Services
KLEENLine Sanitary Product Handling Systems
LSI Pressure Sensitive Labeling Systems
Matrix Vertical Form Fill Seal Systems
NJM Packaging Pharmaceutical Packaging Systems
Orion Packaging Stretch & Pallet Wrapping Systems
Ossid Tray Packaging & Weighing Systems
Pace Packaging Bottle Unscrambling & Orienting Systems
Pacific Packaging Viscous Filling & Capping Systems
P.E. Labellers Decorative Labeling Systems
Rennco Vertical Bagging & Heat Sealing Systems
Roberts PolyPro Bottle & Box Handles & Application Systems
Shuttleworth Conveying & Material Handling Systems
Southern Packaging Rollstock Pouch Packaging Systems
Tekkra Shrink Bundling Systems
Texwrap Shrink Wrapping Systems
Toyo Jidoki Pre-Made Pouch Packaging Systems
Weiler Labeling Labeling & Serialization Systems
Wexxar/BEL Case Forming & Sealing Systems
Zalkin Americas Capping & Cap Handling Systems
Zalkin EMAA Capping & Cap Handling Systems
Zarpac Engineering & Integration Services

Powered by Pro Mach

Buying a Label Printer – Resolution

Barcodes - hexSo you’ve determined that you need to purchase a label printer and one of the first things you notice is that there is a choice of printhead resolution. Many models come in 203 and 300 dots per inch versions, others might add 400 or 600 dots per inch to the mix. You’ll notice that the price increases quite significantly as the resolution increases – that high res printheads don’t come cheap.

How to decide what is needed?

If the job the printer will be asked to do is the printing of shipping labels, the basic 203 dpi is usually fine. Printers of this resolution are lower in cost and also can run at the highest print speeds.

As the labels become smaller and font sizes get small, the higher resolution models come into their own. The other deciding feature is the sizes of barcode that need to be printed.

Barcode sizes are often expressed in the codes x-dimension – this is the width of the smallest bar (for linear of 1D barcodes) or the size of the little squares that make up a 2D barcode, like a Datamatrix. The sizes are usually expressed in 1,000ths of an inch or mils. A 10 mil barcode, for example, would have a small bar size of 0.010 inches.

Because the printheads on the thermal printers comprise of discrete elements (the size determined by the resolution) each printer type can print a pre-defined range of sizes. See the table for the element (pixel) size of the different resolution printers:

Pixel sizes for thermal transfer printers

This shows the print sizes that can be obtained from the 4 resolution types. The label design software allows the designer to choose the x-dimension of the barcode based on these sizes. You can see that for a 203 dpi printer, choosing just 1 pixel or print element for the barcode will give an x-dimension of 0.0049 inches – just under 5 mil. By combining 3 adjacent elements, the x-dimension increases to 0.0148 – just under 15 mil.

This can be important because often the x-dimension of the barcodes is specified in a drawing. For example, if the drawing of a label for an electronics item calls for a Code 39 barcode with 5 mil x-dimension, the table shows me that I’d need to use a 600 dpi printer to get that size.

If I was a defense contractor and needed to print UID barcodes in the smallest possible space, I’d see from the MIL-STD-130 spec that the allowed size range is 7.5 – 25 mil. The 406 dpi printer gives me an option which is very close, but I know from past experience will fail verification for being too small. I’d, therefore, go with the 8.3 mil size that is offered by a 600 dpi printer.

So if you have the task of specifying a new label printer, it is really helpful to know what size barcodes will need to be printed. It is very frustrating to discover that the nice new printer you’ve purchased isn’t capable of printing the barcode you need.

How can we help you maximize your label printing equipment investment? Contact us today – 888-438-3242 Option#3 or you can contact me directly at  dholliday@idtechnology.com. We’ll get you in touch with one of our ID Technology specialists right in your area.

Share Button


  1. What if I’m printing a 3D barcode that is 0.5×0.5 inches?


    Melissa Stalker

  2. David Holliday says:

    You mean a 2D barcode like a Datamatrix or QR Code, right? The best printer will depend on the amount of data you need to encode.


  1. […] will I need to be able to print the text, barcodes or graphics that my printer needs? I wrote about choosing the resolution for a label printer a while […]

  2. […] When printing barcodes for industrial barcode scanners (both linear and 2D) it is a good practice to keep the X Dimension greater than 7.5 mils (0.0075 inches). This ensures that any industrial quality barcode scanner is able to read the barcode. Note that label printers are not able to print any size barcode – this is discussed in my printer resolution article here. […]

Speak Your Mind