Help 2017-10-16T19:52:10+00:00

Is your image the right size for your poster?

Step 1:
Add the size of your image in pixels

Width (pixels)

Height (pixels)

Result:

Step 2:
Add the size of your poster in millimetres

Width (mm)

Height (mm)

How big can I print?

The tables show the image quality expected from various camera resolutions. These figures assume that you will be using the entire image without cropping as cropping will reduce the final file size.

  • 5MP - iPhone 4
  • 8MP - iPhone 5, 6
  • 12MP - iPhone 6s, 7, 7plus, 8, 8plus, X
  • 13MP - Galaxy S4
  • 16MP - Galaxy S5, S6, S7
A0 (1189 x 841mm)
5MP - Acceptable (50 dpi)
8MP - Good (72 dpi)
12MP - Good (72 dpi)
13MP - Good (72 dpi)
16MP - Great (100 dpi)
20MP - Great (100 dpi)
A1 (841 x 594mm)
5MP - Good (72 dpi)
8MP - Great (100 dpi)
12MP - Great (100 dpi)
13MP - Great (100 dpi)
16MP - Great (100 dpi)
20MP - Great (100 dpi)
A2 (594 x 420mm)
5MP - Great (100 dpi)
8MP - Great (100 dpi)
12MP - Great (100 dpi)
13MP - Great (100 dpi)
16MP - Great (100 dpi)
20MP - Great (100 dpi)

Setting up your poster artwork file

What file types do you accept?

We accept a range of different formats: JPEG (JPG), PNG, TIF, PDF. These are the formats we recommend:

  • For photos: high resolution JPEGs (preferably uncompressed)
  • For graphics or text: vector based PDFs
  • For a mix of graphics and photos: PDFs
What is the difference between vector and bitmap images?

A bitmap (e.g. JPEG, PNG, TIF) is made up of thousands of tiny squares or 'pixels' which are all the same size. The number of pixels in an image is called 'resolution'. When an image looks sharp or photographic it has a high number of pixels and it is a 'high resolution' image measured in pixels per inch (PPI). When there are fewer pixels an image will look soft or 'pixellated'.

As bitmap images have a set number of pixels, they will lose quality when enlarged. It is, therefore, better to send us 'high-resolution JPEGS'. A vector image uses coordinates to plot each point on a line or curve. This means that vector images can be enlarged while maintaining quality. Save graphics, text and line art as 'vector based' PDFs. This is possible in applications such as Adobe Illustrator, InDesign and Photoshop.

Bleed and trim set-up guide

At PosterFactory we print to the edge of your specified page size. To get the best possible results, we suggest setting up your print file with 5mm of bleed (extra image) on all sides of your print. Trim marks are usually set outside of the bleed area.

If you are unable to provide bleed or trim marks, make sure that any text or important elements are not too close to the edges.

Our resolution guide

The recommended resolution for printing posters from A2 to A0 is a minimum of 72ppi at final output size. Higher resolution files are the best. The following sizes are a guide to pixel resolutions required for various print sizes. Before uploading your image, check that your image resolution is high enough for the size print that you require.

  • A2 (420mm x 594mm) - 1191 x 1684 pixels @72ppi
  • 30 x 40” (762mm x 1016mm) - 2160 x 2880 pixels @72ppi
  • A1 (841mm x 594mm) - 2384 x 1684 pixels @72ppi
  • A0 (1189mm x841 mm) - 3370 x 2384 pixels @72ppi
Checking your image resolution

If you don’t have a dedicated image processing program you can view your image’s resolution in the ways outlined below.

Windows:

Right click on the image file and select ‘Properties’. Select the ‘Details’ tab and scroll down to ‘Dimensions’.

Mac:

Select the image and select File/Get Info. Pixel dimension will be displayed in the ‘More Info’ section.

Will my poster match what I see on my screen?

It will probably end up looking better than you expect. Image quality is our passsion and we have selected the best possible machines to produce your posters. We use Epson printers for truely outsanding colours, clarity and precision printing. We ‘calibrate’ our machines to ensure we exceed the result you are expecting.

What’s the difference between RGB and CMYK?

We print using CMYK technology to print your posters.

RGB
  • Red, Green and Blue
  • Used for screens
  • Uses pixels of varying amounts of RGB light to create colours
  • The higher the levels of RGB the brighter the colour
  • As RGB colours are created with light colours can be brighter than CYMK
CMYK
  • Cyan, Magenta, Yellow and Black
  • Used for print
  • Uses halftones or dots and colours become darker the more CMYK used
  • CMYK images get their brightness from the paper stock they are printed on