# Thread: what resolution needed for A1 size printing?

1. ## what resolution needed for A1 size printing?

intend to do a photo collage in A1 size as in 594 x 841 mm. what is the recommended resolutions needed? and any recommended shop at bras basah for large format inject printing??

2. ## Re: what resolution needed for A1 size printing?

a wild guess.

assuming you use a printer with an output resolution of 300 dpi, converting 594mm x 841mm gives 23.4" x 33.1".

multiply this by 300 gives the required input file having 7020 pixels wide by 9930 pixels tall.

if a lower print resolution is used, then adjust accordingly...

hope i'm correct with the calculations.

3. ## Re: what resolution needed for A1 size printing?

that's huge! the photos i hv is onli 1152 x 1728... guess i hv to use at least 6 photos to join them together...

4. ## Re: what resolution needed for A1 size printing?

At that size, you can get away with 100dpi. I mean who looks at that picture from 30cm away? Although I have to say that your resolution of 1152x1728 is a bit small... At100dpi, you need 2340 x 3310, something that a 8MP camera should have no problem. You just need 2 pictures join together is enough.

5. ## Re: what resolution needed for A1 size printing?

Frankly there's no one answer to this.

A lot depends on the capabilities of the large-format inkjet printer's RIP, and hope that the operator is knowledgeable enough to know how to optimally set up the RIP and then advice you.

6. ## Re: what resolution needed for A1 size printing?

Originally Posted by Watcher
At that size, you can get away with 100dpi. I mean who looks at that picture from 30cm away? Although I have to say that your resolution of 1152x1728 is a bit small... At100dpi, you need 2340 x 3310, something that a 8MP camera should have no problem. You just need 2 pictures join together is enough.
im doing the photo collage for a fren's wedding. the soft copy photos were given back by the studio. i can only work on the given resolution.

so let say i create a 2340 x 3310 photo collage, must i request the print shop to print at 100dpi? what will happen if it is print on 300dpi? will it look worst?

7. ## Re: what resolution needed for A1 size printing?

You print at 300DPI will end up not enough to fill the paper - your photo in one corner of the paper or centre and the rest end up white.

Originally Posted by sunsetbay
im doing the photo collage for a fren's wedding. the soft copy photos were given back by the studio. i can only work on the given resolution.

so let say i create a 2340 x 3310 photo collage, must i request the print shop to print at 100dpi? what will happen if it is print on 300dpi? will it look worst?

8. ## Re: what resolution needed for A1 size printing?

Originally Posted by sunsetbay
im doing the photo collage for a fren's wedding. the soft copy photos were given back by the studio. i can only work on the given resolution.

so let say i create a 2340 x 3310 photo collage, must i request the print shop to print at 100dpi? what will happen if it is print on 300dpi? will it look worst?
No, you first complete the image. You can then try to up-rez (aka up the resolution) via various tools like SmartPixel, or Fractal Print, etc software. You then set the image size to what you need by the pixel density (but NOT resampling!) to fill up the required print dimension.

When you send it for printing, tell them it is for A1, and on the spot, confirm with them when they open the file that it would be what you want.

9. ## Re: what resolution needed for A1 size printing?

Hi Bro,

If you are using photoshop, you'll just need to open a new A1 size with ard 150dpi. Afterwhich you can cut and paste your original photo to the new A1 file and scale it to A1 size before saving it.

The operator normally prints btw 90dpi to 120dpi and trust me, it isnt really that obvious to human eyes to detect the differences. For such sizes, it is for viewing from at least a distance.

Also, try to print using solvent instead of inkjet as it can last longer but slightly pricer.

Hope it helps.

Cheers

10. ## Re: what resolution needed for A1 size printing?

thanks for all the guides. had created a 4961 x 7016 collage in tiff format instead & hand over to my fren. hope it will turn up well.

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