Paper to print... posters for the underground

I have been using the CBS Outdoor Advertising site to do a lot of research into how to go about printing posters to produce successful advertising campaigns on the underground.
Looking up previous campaigns and trying to associate them with my own.

For the escalator panels... you can only print 100 or more posters. And the following companies print both litho or screen onto approved fire retardant board.
For the 4 Sheets, there is a list of different places who will print your posters for you to the correct specifications. Again using litho print.

AUGUSTUS MARTIN LTD.

St. Andrew’s Way

Bromley-by-Bow 

London 

E3 3PB

Contact details: 

Laurie Haldane or Simon Crabb

Tel: 020 7536 5222 

Fax: 020 7537 2182

Email: tubecard@amartin.co.uk

ISDN: 020 7537 9971

DELTA DISPLAY LTD.

153-157 Blackhorse Lane 

Walthamstow 

London

E17 5QZ

Contact details:

Bill Moore 

Tel: 020 8498 4400 

Fax: 020 8498 4401 

Email: cbs@delta-display.com 

ISDN: 020 8531 6450

SMP GROUP

2 Swan Road 

Woolwich 

London 

SE18 STT

Contact details: 

Claire Mitchell or Nigel Mogg

Tel: 020 8855 5535 

Fax: 020 8855 5367 

Email: cbs@smpgroup.co.uk 

ISDN: 020 8317 2194

For 6 Sheets, the CBS print them themselves, all you need to do is send a PDF of your specific file to the following address, and they go from there. They also use litho or screen print processes. 

CBS Outdoor -

Copy Approval 

Camden Wharf 

28 Jamestown Road 

Camden

London 

NW1 7BY

For the 4 Sheets, there is a list of different places who will print your posters for you to the correct specifications. Again using litho print. 

All of these posters were printed on Blueback poster paper. It is now transitioning into CBS Outdoor Performance paper, designed by the CBS for more money-efficient printing. 

All of the size specifications and prices for these 3 separate poster scales are previously researched in this context blog.

If I were to print myself, I would use litho print, however this would be impossible for the task at hand as you would need to print in bulk (100 or more) so I am just going to print on the nearest stock available to this as a mock-up for this module.