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TIFF at 300dpi ?
Old 03-12-2005, 10:38 AM   #1 (permalink)
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I have looked for this answer in the forum with no real answer so if anyone can clear this up it would be great.

A model that I worked with a few months back asked me to send her an image I gave her in a format TIFF and at 300dpi . She wants to print it or something. I have no problem with the format (tiff ) but the 300dpi is the problem. In PS I go to the image size window and it says 240 pixels/inch.

How do you view/change the DPI of an image ?

Mike
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Re: TIFF at 300dpi ?
Old 03-12-2005, 10:44 AM   #2 (permalink)
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Mike,
Use the crop tool and set the dpi to 300 in the box beside the diminsions. I would clear out the size in the other two boxes to make sure it just makes the image 300 dpi reguardless of final image size.

Chris
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Re: TIFF at 300dpi ?
Old 03-12-2005, 11:00 AM   #3 (permalink)
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Your images are measured in ppi, which is the available resolution of the image itself. DPI is the resolution available output of the printer and has nothing to do with the image ppi. Except that if the image ppi is very low, like web images are only 72ppi, and the printer reproduces the image at 300 dpi it will only stretch out the image to fit. Just remember, the higher your image ppi the better the print on printers at 300 dpi. An image at 240 ppi will print pretty well on a 300 dpi printer.
Any other assistance out there is always appreciated, I think this is right.
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Re: TIFF at 300dpi ?
Old 03-12-2005, 11:09 AM   #4 (permalink)
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Ok, so all I need to do is give her the highest resolution image in a tiff format. Well thats easy enough.. Thanks

Mike
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Re: TIFF at 300dpi ?
Old 03-12-2005, 01:39 PM   #5 (permalink)
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There is a direct relationship between ppi and dpi. If the image is going to be used for print (magazine, comp card, etc...), the pre-press folks will want the image at 300 dpi and the final print size should be used at no more than actual size. Reducing the image in a page layout program is fine, but blowing it up, will reduce the resolution, which can lead to issues. You can easily set the image up to 300 dpi in Photoshop. The result, when done correctly, will reduce the physical dimensions of the file.

Steps:
1. Open the file in Photoshop
2. Go to> Image>Image Size
Your file information will show you the physical dimensions and the ppi in the "Document Size" area.
You should see a dimension (width and height) and ppi.
3. In this window; IMPORTANT!!!! un-check the "Resample Image" box.
4. Change the "Image Resolution" from 240 to 300.
You should see a small decrease in your width and height boxes... this is what you want to see.
Your file size should remain the same. The only thing that changes is the physical width and height dimension.
In pre-press, we prefer this set-up because we can easily check that an image has the proper resolution at the size placed to print well.

If this is not clear, feel free to call me and I will walk you through it on the phone.

Paul
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Re: TIFF at 300dpi ?
Old 03-13-2005, 05:47 PM   #6 (permalink)
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In this case what she actually means is the PPI (pixels per inch) of the file. This is one of those terms that many people commonly misspeak. No big deal, except for confusion like this.

OUTPUT is measured in DPI. Files in photoshop are measured in PPI. 300PPI is a very common standard required for high-quality, hi-rez output such as that of many glossy-stock monthly publications, or digital C-prints for lab output, and so forth.
 
 
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