Potrait - Borders - Print

[Jimcglasgow]

Dear Community Sorry if this a silly question but im generally struggling with this.

I have decided to embark on printing some of my images and im general not getting my head round what im doing wrong.

I have a 4x6 potrait picture i have done some basic editing in Lightoom. I then take it to photoshop to do some further tweaks but mainly to create a border round the potrait. I adjust the canvas size to 4x6 and try resizing my portrait image to give me an equal border around potrait using Canavas size and Image size options. seems okay on screen when done but when i print preview in Epson iPrint the print preview always shows a narrow height border ( ie. its not all equal size border).

Not sure if im doing something wrong..... or havent graps it, based on picture ratio.. 

I would welcome some help on this as i have tried a few other dimensions and face the same problem, yet when i sent them to Printer companies previously always seemed to be okay?

[Abambo]

The printer modifies your picture size. You can't control that for borderless printing. Normally the border is done by cutting an oversize paper after the print to size.

[Bojan Živković]

If you are trying to add equal borders on all sides by shrinking photo it won't work. here is why:

Lets say you have 500x700px image (5x7 ratio) resolution 500PPI. If you shrink half inch on all sides without maintain aspect ratio it will remain 250x450px what is distorted image (5x9 ratio).

If on other hand you want to maintain aspect ratio and avoid distortion it will end up 250x350px and not equal borders on all sides (see image below, shrinked as described with maintain aspect ratio).

If you are looking for equal borders would you mind if that border covers edges of your image? Border can be added using Stroke option, for example.