File upload guide

When you upload a file for print at Purpleposter the files needs to be the correct aspect ratio, correct color profile for print and a good quality. We recommend using Photoshop (or any other image editing program) and to save your artwork as .PDF.


How to export your file in Photoshop (recommended)

Here’s a quick guide to setting up your artwork PDF for print using Adobe Photoshop CC. It shows best practice for designing for online printing and how to get the best results from your design.

Design tips we’ll cover are:

• Setting up your canvas
• Adding and placing an image
• Exporting the PDF document

Setting Up Your Canvas

• Open Photoshop
• Go to File > New
• Select a unit of measurement – we recommend working in millimetres for print
• Example for A3 size: 297 x 420 milimeters (29,7 x 42 cm.) or an aspect ratio of 1:1.41.
• Put the finished document size in the height and width boxes
• Choose your orientation
• Set resolution to 300dpi
• Set colour mode to CMYK
• Select Create

Placing an Image

To place an image either:

• Drag an image file onto the canvas, or
• Or go to File > Place Linked to select an image from your files
• Adjust the size of the image by clicking and dragging the handles on the corners of the image

If the image is RGB, you’ll need to change it to CMYK so it’s suitable for printing.

• Go to Image > Mode > CMYK Color
• You might notice a slightly colour change – this is normal and reflects how the colours will print

Exporting the Document

• Go to File > Save As
• On the file type selection, choose PDF
• In Save Options, tick ‘As a copy’, untick ‘Layers’ and set Color to CMYK
• Name your file
• Click Save
• In Adobe PDF Preset, select [PDF/X1a:2001]*
• Click Save PDF

*Don’t have this option? Here’s how to manually set this up:

• In General, untick Preserve Photoshop Editing Capabilities
• In Compression, if options are already set as 300dpi, click Do Not Downsample
• In Output, change Color Conversion to Convert to Destination, then change Destination to Coated FOGRA39
• In Security, make sure there are no passwords protecting the file otherwise we won’t be able to open it at our end
• Click Save PDF

Visual guide for Photoshop