Covers Paper: 100 GSM glossy (Covers) 300% maximum ink weight
55 GSM improved news (Insides) 260% maximum ink weight

For a list of approved repro houses, Bureaus and advertising delivery methods please see the links below:

Delivery Methods: http://www.theguardian.com/advertising/electronic-ad-delivery

For some general guidelines to designing your ad to make it suitable for print, please see this link: http://specle.net/uk/guardian-news-media/guardian-and-observer-print-advertising-guidelines

WE DO NOT accept emailed advertising of any type. You must use one of our approved delivery methods.

For bleed ads, all vital advertising material (text and images) should be kept within the type area to avoid loss of content during product trimming

We never accept any advertising copy with crop marks, colour bars or other printers marks of any description. Advertising should be supplied to exact dimensions only.

Please ensure that there are no full stops in the file name.