| Joined: | Sun Apr 1st, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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Used for display sign backgrounds, the grey card I sent you is made of Foamex, it's available in various thicknesses, the is also a 'cheap' product which is hollow with thin walls rather like conservatory roof polycarbonate, used for temporary signs and cheap signs for the likes of rallies and stuff.
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Robert.