Correx Printing London
020 3375 6674 info@silverimagelondon.com Open 24 hours, 7 days a week — call or email and we will tell you what is possible today.
Correx signs and site boards printed in London the same day. Fluted polypropylene in 3.5, 4 and 5 mm, printed direct to the board on our UV flatbed and cut to size or shape on the Zünd here — site notices, hoarding boards, wayfinding arrows and event signage, eyeleted, drilled or score-folded and ready to fix. Collection round the clock or courier across Central London.
Every job is quoted on its specification. Send us the sizes and we will come back with a firm figure.
What Correx is, and where it earns its keep
Correx is the trade name for fluted twinwall polypropylene: two flat printable skins over a corrugated core, which is why a full 8×4 sheet weighs almost nothing yet holds its shape on a fence line. It is waterproof through and through — not coated, but plastic all the way — and cheap enough to treat as a consumable, which is exactly what temporary signage should be.
We print direct to the board with UV-curable ink. The ink cures instantly under the lamps, so it comes off the flatbed dry, scratch-resistant and ready to cut — no laminating stage, no paper mounted on top to peel in the rain. The semi-matt surface stays readable under floodlights and low winter sun, which matters more on a site entrance than any amount of gloss.
Where it goes: construction sites — safety notices, contractor boards, RAMS and mandatory signage cable-tied to fencing; property marketing — T-boards and slotted boards; events — wayfinding arrows, entrance boards and stall signage for venues and parks; and security — CCTV and warning notices on gates and scaffolding.
| Grade | Weight | Rigidity | Typical use | Outdoors |
|---|---|---|---|---|
| 3.5 mm standard | 600 gsm | Light, slightly flexible | Short-term placards, indoor direction arrows, high-volume runs | Up to 6 months |
| 4 mm trade | 700 gsm | Medium | Site safety boards, agent boards, fence-mounted notices | 6–12 months |
| 5 mm heavy duty | 1000 gsm | High | Large panels over 1200×900 mm, free-standing inserts, year-plus positions | 12 months and beyond |
Printing and finishing, all under one roof
The press is a UV flatbed with high-opacity white alongside CMYK, printing direct to the sheet at native 1200×720 dpi. Because the board never leaves the building between printing and finishing, the same job carries straight on to:
Contour cutting on the Zünd — arrows, logo shapes, slotted agent boards, anything a vector path describes. Eyelets — 11 mm, corners or every 500 mm on larger perimeters, ready for cable ties. Drilling — 4 mm corner holes for screw fixing to timber or brick, with penny washers recommended so the head cannot pull through the flutes. Score-folding — creased channels so a board wraps a square post or stands as a self-supporting triangle.
Which thickness: 3.5 mm when you need hundreds of short-lived placards and unit cost decides; 4 mm for anything on scaffolding, fencing or posts — the default for site work; 5 mm when the panel is large and unsupported, or staying out beyond a year.
Turnaround and delivery
Correx is a same-day material here: sheets are in stock, the ink cures instantly and the cutting happens on the same floor. A file sent in the morning is normally finished the same afternoon — and because the workshop is staffed through the night, files and approval by 21:00 are printed overnight for a morning delivery, subject to capacity and the size of the run. There is no fixed cut-off: capacity decides, so call at any hour and you will get a straight yes or no on your deadline.
Courier delivery runs across Central London — the City, West End, Canary Wharf and Southwark are daily routes — typically within 1 hour of dispatch. Collection from the counter is available around the clock, which is how site managers pick up compliance signage before a morning inspection.
One honest boundary: we print, cut and finish — we do not install. Boards leave here with the fixings prepared to your spec; fitting is yours or your contractor’s.
Artwork specifications
Bleed, cut paths, colour, resolution, file format
Direct-to-board printing shows every soft pixel — preflight the file for free.
| Requirement | What we need | Why |
|---|---|---|
| Bleed | 5–10 mm on every edge | The Zünd cuts to the printed edge; bleed is what makes that edge clean. |
| Safe margin | Text 10 mm inside the trim; clear of eyelet and drill positions | An 11 mm eyelet takes a real bite. Tell us the fixing positions and we keep the artwork away from them. |
| Cut path | Named vector path for contour shapes | The router follows a vector line, not the picture. A shape without a path gets a rectangle. |
| Colour mode | CMYK, not RGB | Warning reds and safety yellows shift visibly in an automatic RGB conversion — send Pantone references where the colour is the meaning. |
| Resolution at final size | 150 dpi at the finished size | Measured on the printed board, not in the file: artwork built at 1:10 needs ten times the dpi. Vector graphics carry no resolution and are always the better send. |
| File format | PDF preferred — but send what you have | Every file is checked here before production; if something will not survive at full size we say so before printing, not after. |
Before you upload
- Export a print-ready PDF, vector wherever possible
- Convert fonts to outlines
- Extend backgrounds into the bleed
- State thickness and quantity with each size
- Say where eyelets or holes go — or that you want none
- Name the cut path if the shape is not a rectangle
Q&A
Can you print Correx signs the same day?
Yes. Sheets are stocked here and printed direct on our UV flatbed, so a file sent in the morning is normally cut, eyeleted and ready the same afternoon. Files and approval by 21:00 are printed overnight for a morning delivery, subject to capacity and the size of the run.
Will wind bend or snap a Correx sign?
Mounted flat against a hoarding or wall, Correx does not snap. On open mesh fencing or a single post the board can fold along its internal flutes, so we orient the flutes vertically and recommend 4mm or 5mm sheet. A board that folds in wind is almost always a flute-direction problem, not a material problem.
What is the difference between Correx and Foamex foam board?
Correx is fluted polypropylene: very light, low cost, waterproof, rated 6 to 12 months outdoors, and the right board for fences, hoardings and anything temporary. Foamex is solid PVC foam: heavier, completely flat and better looking close up, the right board for indoor and sheltered positions. If it goes on a fence, it is Correx; if it goes in a reception, it is Foamex.
What is the largest single Correx board you can print?
The master sheet is 2440 by 1220 mm, printed edge to edge. Anything larger is produced as tiled sheets designed to butt together, which is how long site runs and perimeter boards are done.
How do the signs fix to mesh fencing or scaffolding?
We punch 11 mm eyelets in the corners, or every 500 mm along the perimeter on larger boards, and the sign cable-ties through them. For timber or brick we drill 4 mm corner holes for screw fixing instead. Say which fixing you are using when you order and the holes go where they are needed.
Is Correx recyclable and can the signs be reused?
Yes to both. Correx is polypropylene, recycling category 5, and clean boards are accepted by most commercial waste contractors. Because the UV ink is scratch-resistant and the board is waterproof, signs can also be taken down, wiped clean and reinstalled several times before they look tired.
Often ordered with this
Key facts: ordering tonight
- Open 24 hours, 7 days a week, including Saturdays, Sundays and bank holidays.
- Print production runs 24/7; the walk-in counter serves the day and evening, and the status bar at the top of the page shows live whether it is open right now.
- Files and payment received by 21:00 → overnight production for delivery before 9am the next morning, subject to that night’s capacity; we confirm at quotation whether the run fits.
- No fixed overnight cap: tell us the quantity and we say at quotation whether it can be done in time.
- Overnight jobs are normally couriered to arrive before your office opens; collection is arranged around your arrival time — call before you set off after 8pm so the job is bagged and waiting at the counter.
- No minimum for walk-in jobs during the day — one copy is a normal job. Out-of-hours collection or delivery carries a £95 minimum plus courier if required.
- Same-day and overnight courier delivery across London, most often EC1–EC4, W1, WC1–WC2, E14 and SW1.
- Exhibition delivery to ExCeL, Olympia, the Business Design Centre and other venues: send us the hall, your stand number, the named person on the stand and their mobile, and the build-day or opening time you need it by; we deliver to the stand.
- Send what you have: we check the artwork before anything goes on press and tell you what to fix; a print-ready PDF (CMYK, 3 mm bleed) is the fastest route.
- Quotes come with a secure payment link — Visa, Mastercard, Amex, Apple Pay, Google Pay, PayPal and Klarna; production starts once payment is in.
- Courier delivery within London is usually in the region of £35–45, depending on the postcode and which courier is free; the exact figure is on your quote and is added to the job price.
- A proof is available on request; when we design the artwork you always get a final proof to approve. Print-ready files are printed on site and our operator checks the run against a printed proof sample before it leaves.
- Before we accept an urgent job we look at what could go wrong with the file, the stock and the finishing, and plan so that a reprint would still fit inside your deadline.
- Every order has a dedicated member of staff and an agreed completion deadline; we do not run an e-commerce queue, so the time we give you is for your job.
- Bank transfer is accepted alongside the payment link: tell us when you have sent it — the job goes to production once accounts confirm it has arrived.
- Outside London and towards the M25 courier costs more: we check with the couriers and confirm the price with you before booking.
- The general 6–12-month outdoor lifespan is a guide rather than a limit for every grade: 3.5 mm is rated up to 6 months, 4 mm for 6–12 months and 5 mm for 12 months and beyond.
Send us the board list
Sizes, thickness, quantity, fixing and the deadline — that is the whole specification. We come back with a firm price and check the artwork before anything goes on the flatbed.
Open 24 hours, 7 days a week. Call before you set off after 8pm so we have your boards ready at the counter.
SAP Business Network member registered member
