A question that is often asked is what is the best resolution required when sending any graphics. The answer very much depends on the quality that you require and the size that you required to printed (especially for posters)
Usually a minimum of 300 dpi is absolutely fine. Using a higher dpi is only required if you are doing large format printing such as A2, A1 A0 posters.
For these larger posters or a high quality photos then you can use 400-500 dpi, but in most cases 300 dpi will suffice.
If you have a documents, photos or plans that you are unsure about just email one page to us and we can do a test run for you at no cost just to check the dpi is sufficient. This is particular important if you have photos that can sometimes be at a lower dpi and the quality of your scanning may not be sufficient.
What is dpi?
DPI stands for Dots Per Inch which technically means printer dots per inch. Today it is a term often misused, usually to mean PPI, which stands for Pixels Per Inch. So when someone says they want a photo that is 300 dpi they really mean that they want 300 ppi