A great design or visual concept can be really brought to light when posters are printed professionally. When creating custom poster it is crucial to have the proper resolution, color scheme, and format. Whether your are looking to create a movie poster, event poster, concert poster or graphic design poster, we have the right tips for you below before going to print.

Pixels are the small dots that comprise a digital picture.  The more pixels present in a picture then the higher the resulting resolution.  For large format prints like custom posters it is crucial to start with high resolution images.


When using digital images captured on a camera there are some camera settings that will help ensure that your picture is of the highest quality resolution for going to large format poster printing.  Maybe sure your camera settings enable the highest possible resolution.

When measuring the resolution of image files before going to print nearly all professional printers require a minimum of 300 dpi (300 pixels or “dots” per inch).  This is the standard minimum resolution for large format printing.

You can go with lower resolution images (less than 300 dpi) when printing large posters or banners that will be viewed from a great amount of distance (think store banner sized intended to be viewed from ongoing traffic).  But for most custom posters that will be viewed from up close 300 dpi is the required image resolution.

Dot/inch – Pixel/inch

Conversion Table

1 dpi = 1 ppi

2 dpi = 2 ppi

3 dpi = 3 ppi

4 dpi = 4 ppi

5 dpi = 5 ppi

6 dpi = 6 ppi

7 dpi = 7 ppi

8 dpi = 8 ppi

9 dpi = 9 ppi

10 dpi = 10 ppi

11 dpi = 11 ppi

12 dpi = 12 ppi

13 dpi = 13 ppi

14 dpi = 14 ppi

15 dpi = 15 ppi

16 dpi = 16 ppi

17 dpi = 17 ppi

18 dpi = 18 ppi

19 dpi = 19 ppi

20 dpi = 20 ppi

21 dpi = 21 ppi

22 dpi = 22 ppi

23 dpi = 23 ppi

24 dpi = 24 ppi

25 dpi = 25 ppi

26 dpi = 26 ppi

27 dpi = 27 ppi

28 dpi = 28 ppi

29 dpi = 29 ppi

30 dpi = 30 ppi


All professional printers use CMYK or Cyan, Magenta, Yellow and Key (black) as the standard setting on printers when going to print. CMYK is also the basis when it comes to the ink used in printing full color materials. On the other hand RGB or Red, Green, Blue is the standard used on most computer monitors when displaying images on a screen.  Given this discrepancy you must convert the color mode of the monitor for your laptop or desktop from RGB to CMYK for a more precise color match from your poster layout as it appears on the screen to the printed copy which will appear on the paper of your custom poster .

Nearly all professional printing services require that your files have been converted from RGB to CMYK.


Color Name




































Here is an example of the RGB image converted to CMYK. Notice how they differ in color:

Image in RGB format

CMYK image after conversion

Select Between Bulk or Large Format Posters

Advances in digital printing have allowed for high quality printing of posters on different paper sizes. You can now choose from a wide range of customized poster sizes anywhere from 8″ x 8″ to as large as 120” x 59”. At Guru Printers we offer two types of custom digital poster printing in bulk or large format.  For the most cost-effective and budget friendly poster printing we recommend large format for smaller quantities of poster runs and our bulk option for those looking to print larger quantities


Bulk Posters

Large Format Posters


50–100,000 pieces

1-50 pieces


Can print from 8.5″ x 11″ to 27″ x 39″

Can print from 8″ x 8″ to 120” x 59”


100 lb. Paper Gloss
100 lb. Paper Matte
80 lb. Paper Gloss
10 pt. Cardstock Gloss
10 pt. Cardstock Matte

High Gloss


More affordable for large orders

More affordable for short run orders

Turnaround Time

1-3 Business days

1-3 Business days

Acceptable File Formats

Bitmap images or raster images are essentially pixels on a grid. Keep in mind that resizing of raster images affect the quality and resolution of the image.  A good example of a raster or bitmap image is your typical scanned photo. Formats for bitmap file are in .bmp, .jpeg or .psd.

Vector Images comprise of shapes and lines with varying attributes of color, fill and outline. Vector images are not defined by pixels, so they render at a very high quality. Unlike bitmap or raster images resizing or scaling of the images has no impact on the image resolution or quality.  Vector images take up smaller file size and are not recommended for posters that incorporate photographic images requiring high quality reproduction.

Here are some of the common file types used in custom poster printing.

File Extensions

Description/Program Used

.jpg or .jpeg

Standard format for photographic image compression developed by the Joint Photographic Experts Group


Bitmap file created using Adobe Photoshop


Adobe Illustrator drawing or vector graphics file


Encapsulated postscript image file created using Adobe Illustrator; designed for high resolution printing of illustrations; standard file format for importing and exporting PostScript files


Corel Draw Vector drawing file


Tag Image File Format; preferred bitmap graphics format for high-resolution postscript printing


InDesign Document from Adobe Systems


Portable Document File from Adobe Acrobat


Document file associated with Microsoft Publisher


The type of paper you print your custom poster on plays a large role in the overall look of your poster.  For more vibrant colors we recommend glossy paper that brings a sheen and gloss which attract the eyes from a distance.  If you want to go with a more unique or unconventional look and do not care much for the glossy look, we also offer matte finish print paper. 


High Gloss

Great for color vibrancy and wide color ranges.  Recommended for low light settings as bright lighting can cause glare as well as making any smudges or fingerprints from handling visible.  However, given the smooth glossy surface most fingerprints can be easily wiped off with cloth at no detriment to the integrity of the print.


Our most requested and popular type of poster paper has slightly less gloss than our high gloss option resulting in less glare in bright lighting and fewer visible smudges or fingerprint marks that may appear from handling.


Our matte paper has the least amount of luster or shine compared to our high gloss or semi-gloss papers.  We often have customers choose this option for a more elegant look fit for graphic design or decorative posters.