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Printed wallpaper image size

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Rob Sidwell

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Post Thu Aug 03, 2017 10:00 am

Printed wallpaper image size

Hi all

i have to print some wallpaper for a customer . the artwork they have sent is 7 Meg the picture is of woodland .

The area of the print is approx 2.2m x 5m

I did a sample print and the artwork is very pixelated , the customer assures me it is the same artwork that other offices in different countries have used !

i have seen pictures of the other offices and they do look crisp

i'm pretty sure a 7 meg image is never going to look good at 2.2 m x 5m

any idea of the resolution the artwork should be please
Last edited by Rob Sidwell on Thu Aug 03, 2017 3:55 pm, edited 1 time in total.
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Philip Houston

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Post Thu Aug 03, 2017 10:37 am

Re: Printed wallpaper image size

Hi Rob,
I'm interested in the answer to this question also.

Philip
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Alex Crosbie

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Post Thu Aug 03, 2017 12:22 pm

Re: Printed wallpaper image size

What's the distance the image is being viewed from and what resolution is the image at full size?

Regards

Alex
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Rob Sidwell

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Post Thu Aug 03, 2017 1:47 pm

Re: Printed wallpaper image size

hi , its a boardroom so quite close really , the image before blowing it up is 250mm high @ 300 DPI
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Phill Fenton

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Post Thu Aug 03, 2017 2:10 pm

Re: Printed wallpaper image size

No less than 75dpi at actual size is the common consent
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Rob Sidwell

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Post Thu Aug 03, 2017 2:28 pm

Re: Printed wallpaper image size

Phill Fenton wrote:No less than 75dpi at actual size is the common consent



thanks phill

erm how do i work that out then :blushing:
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David Mitchell

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Post Thu Aug 03, 2017 3:42 pm

Re: Printed wallpaper image size

as far as my understanding goes,

if u have an image @300dpi at a given size

blow that up to double the size and it would half the resolution

so if its at 300dpi at 250mm high your blowing it up by X10 almost making the resolution 30dpi?

i think.
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Jamie Wood

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Post Thu Aug 03, 2017 3:46 pm

Re: Printed wallpaper image size

Rob Sidwell wrote:
Phill Fenton wrote:No less than 75dpi at actual size is the common consent



thanks phill

erm how do i work that out then :blushing:


Each time you double the size, the dpi will halve. So to get to 2200 high, you have to enlarge 8.8 times, which
should give you 34dpi at full size. That's what I reckon, anyway. We usually work at 150dpi full size if possible,
for close up work.
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Rob Sidwell

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Post Thu Aug 03, 2017 3:55 pm

Re: Printed wallpaper image size

Ha thanks for the input chaps, i really appreciate it .

i can go back the the customer now and explain the 30/34 DPI at that size just isn't good enough
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Philip Gibbs

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Post Thu Aug 03, 2017 10:12 pm

Re: Printed wallpaper image size

If they don't have a decent resolution you cold try the genuine fractals plugin for photoshop. That can sometimes do an amazing job at blowing images up.
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Martin Pearson

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Post Fri Aug 04, 2017 10:07 am

Re: Printed wallpaper image size

I use to use Photozoom Pro to enlarge images when doing digital printing, It was recommended on the forum years ago :lol:
I don't do any printing now but would probably still be using it if I did :lol:
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Kevin Busby

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Post Fri Aug 04, 2017 11:10 am

Re: Printed wallpaper image size

Also a plus 1 for PhotoZoom been using it since it was mentioned some time ago on the forums.

Also worth checking get your client to confirm the size of the file before sending just in case his email program is shrinking it before sending it, had the exact same thing with an 8meg wallpaper print that turned out to be 30meg before his email shrunk it. Always try and use a file sending service for files rather than email to ensure this does not happen, assuming it was sent by email of course.
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Simon Worrall

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Post Fri Aug 04, 2017 12:44 pm

Re: Printed wallpaper image size

Hi
We are about to print an image that is just 30 KB onto a pair of canvasses total size 2.4m x 1.6m
The customer is aware that it is very pixellated, even in their large living room, but they like the pixellated effect and are certain they want to go with it. This pic is of a beautiful beach in Tasmania.
I have done very low resolution large work before, and it usually comes out quite interesting, if a bit abstract.
As long as the colours are good and the customer knows what to expect , it can be really successful.
Simon
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Rob Sidwell

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Post Fri Aug 04, 2017 3:35 pm

Re: Printed wallpaper image size

Kevin Busby wrote:Also a plus 1 for PhotoZoom been using it since it was mentioned some time ago on the forums.

Also worth checking get your client to confirm the size of the file before sending just in case his email program is shrinking it before sending it, had the exact same thing with an 8meg wallpaper print that turned out to be 30meg before his email shrunk it. Always try and use a file sending service for files rather than email to ensure this does not happen, assuming it was sent by email of course.



yeah i'm 99% certain it's down to the email "shrinking" the file
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Martin Pearson

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Post Fri Aug 04, 2017 10:53 pm

Re: Printed wallpaper image size

yeah i'm 99% certain it's down to the email "shrinking" the file


If that is the case then could you ask them to send it again but this time via Dropbox or something similar ?
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Myles Brewer

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Post Sat Aug 05, 2017 12:49 am

Re: Printed wallpaper image size

Only just had this issue myself. Wanted to do a test print & fit on a new wall media (Kernowjet interiors 620) before utilising it on a big commercial job. Wife wanted an image of bluebell woods on the bedroom wall, so I searched istock & a few others but even their biggest images were really a bit on the small size & quite pipelined when blown up. Even their XXL images were only around 12-15mb for 300dpi image at around 30" x 20" kind of size. The wall was 5m x 2.7m. Eventually found one she was happy with just over 40mb & it's not too bad when you stand a few feet away. It's not pixely but not crystal clear close up.
I think for a wall this size you'd really need something around 60mb plus to have a really clear image. Here's how it looks.
Woodland Bluebells 2.jpg
Woodland Bluebells 1.jpg
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Chris Chadwick

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Post Thu Aug 17, 2017 6:57 am

Re: Printed wallpaper image size

There is a photo shop plug called alien skin which we have used in the past for similar situations. I normally print a cross section at A3 and send to the client for approval. I have done similar images at this scale using 150dpi and the client has been happy.

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