Exporting seamless patterns from .AI file to .jpg

Question

Hi

I need to create .jpg tiles for seamless patterns and am looking for some advice please.

I create the repeat as an .ai file, then once finished, export as a .jpg. When I then try importing into either InDesign (for a portfolio age) or an online portal for getting samples printed, I'm getting a very thin line between the tiles.

I've looked at the exported file/s and can see that the edge (normally just one) has a one/two pixel band on the outer edge which is a couple of shades lighter in colour than the pattern. This is what seems to be causing the line.

The original tile has bleed and goes over the edges of the artboard, therefore there is no tone or colour change. Has anyone had this and managed to fix it?

Thanks in advance.

Jacob Bugge · Answer

Vikki,

Are you working in accordance with the instructions here,

https://helpx.adobe.com/illustrator/using/patterns.html

including the following?

"If you draw a bounding box around the artwork, make sure that the box is a rectangle, that it is the backmost object of the tile, and that it is unfilled and unstroked. To have Illustrator use this bounding box for a brush pattern, make sure that nothing protrudes from it"

Why the bleed?

And if you (must) use a JPEG, how about creating the tile and full artwork (and Artboard) in sizes and positions of whole pixels (such as having X = Y = 0).

But you can use AI artwork directly in InDesign.

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