Creating a 600 dpi document in InDesign

hello. what can i do to create an interactive pdf with more then 300dpi.. there seem to be no option and i need interactive because its a portfolio with endebed links.. ?/

When printing say for a Riso the dpi is 600. Dpi is the binary resolution, it may or may not be the PPI depending on your work. If you have greyscale or full colour pixel art/photos a lower PPI is usually going to work. But if you have line art or text that needs to be converted to pixels converting them so that PPI is the same as DPI can make sense. Vector art is usually converted at the correct DPI, but if there is no RIP then you may need to use transparency flattener and set it to rasterise all at the DPI resolution. As said before you may want to clarify with your printer if text and vector art is OK. For calculations between PPI and DPI others have already given you the maths.

Never heard of this whatsoever... might be a new thing. But go with what the print shop detailed to you.

@Bevi Chagnon - PubCom.com gave great steps there.

To be clear - 300dpi is for lithographic printing and it's a faux number that is passed around for a long long time.

It's based on the LPI of the output device, and the LPI on platesetters would be set at

80-120 for newspapers

120-150 for rag magazines

150 LPI is standard on a lot of Platesetters and used in most print settings

200 LPI would be for high-end gloss magazines.

The LPI is lower for newspapers as the paper is porous - so less dots per inch so the ink can spread without saturating the paper.

Lithographic printing is done via halftone dots. And to prevent screen clashes that would cause 'moire' which is undesirable and noticeable to the naked eye - the Screen Angles are different for CMYK - producing a Rosette pattern - which is desireable.

So these half tone dots are rotated at angles to prevent them clashing.

These halftone squares are rotated to 45 degrees.

(I'm skipping lots of info here but getting to the point before I bore you)

A square from edge to edge say for 1 pixel is going to be 

1 pixel wide and 1 pixel height.

But a square on it's on tip - then from tip to tip it's 1.41 x 1.41

(Pythagoras)

You take the 1.41 and multiply that by the LPI

So for a newspaper - 1.41 x LPI 120 = 169.2 DPI

Overtime the 1.41 got diluted to x1.5 

And over more time it got diluted to x2

And as I said at the start that most platesetters are set at 150 LPI (whether that's true or not is open to interpretation but lets take it as a given for this scenario)

As the Calculation got diluted to x2

150 LPI x2 = 300DPI

And that's how we got to this number.

So if it's Litho - then ask the printer what LPI their output device is - and then multiply that by 1.41 and that's your lowest DPI that is possible without distortion.

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Now as far as I know - the Digital Printers don't work like this.

Unless they're producing halftone dots.

Digitial printing is a lot more forgiving (to put it loosely)

You can go below the 1.41 x150  (211.5 DPI)

As the digital printing is not using halftone dots - as far as I would be aware.

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Then your DPI also relies on the content of your image.

An image of a sharp waterfall would require you to be at least the minimum DPI

Whether that's 211.5 DPI or 300DPI or 600DPI

You need to match your minimum DPI

But that same waterfall on a foggy day with mist rising out of it and not much detail

You can below your minimum DPI

So images with less detail don't require as high as a DPI as you would think.

It's a bit subjective in those rights.

Along with this - images in black and white or grayscale might not require as high DPI as you would have for the sharp colour images.

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I've never in my life heard of a printers requiring 600ppi or 600dpi

Unless the image is going to be increased on size 

Lets say by double the size - then it would be 300PPI or 300DPI on output

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I've not heard of a mobile screen requiring 400 PPI or 600PPI

For example

A mobile device with

1280x720 4.3 in (110 mm) would yield a Pixel Density (PPI) 342

But I'm not sure this is relatable to the DPI/PPI of a PDF for print.

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And Yes - I am using DPI/PPI interchangeably - as I am aware of the differences - I'm also aware I can do this knowing what I'm talking about.

Many hi-end digital presses are at 400 dpi and greater.

And if the document will also be made into a digital PDF, hi-res monitors and smart phones have 400 ppi or greater.

Build your layout to size, 7 x 5.5.

Ensure that placed bitmap graphics (aka, Photoshop files) have a final Effective Resolution of 600 ppi after you've scaled them in your layout. Check that in the Links panel:

When done, Export to PDF (Print). In the export settings, set the compression to 600 ppi:

That should work for the print shop.