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I am currently designing a PCB to make with the toner transfer method for the first time. I was reading a guide that said to mirror the image before printing it to the paper. However it seems that the paper should not have a mirror image because when you are designing the board it is like looking through the board onto the other side and in turn drawing directly on the paper. Does the PCB design need to be mirrored to work?

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  • \$\begingroup\$ "... when you are designing the board it is like looking through the board onto the other side ..." How sure are you about this? \$\endgroup\$ – Ignacio Vazquez-Abrams Sep 25 '14 at 14:19
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For the toner transfer method, you should reflect the layout of the tracks of the top layer. When designing, the tracks of the top layer, they look like should be on the board. If you print as you see, the transfer will be reflected on the board. For this reason, you must reflect the print of the tracks of the top layer, but not the tracks of the bottom layer.

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  • \$\begingroup\$ oh i see i am only designing a one sided board so i don't need to reflect it \$\endgroup\$ – popgalop Sep 25 '14 at 15:45
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    \$\begingroup\$ You may find (for many purposes) that you can save yourself a lot of work drilling holes by making your handmade boards almost entirely surface mount (including creative attachment of trough-hole parts), and having all your traces on the top. \$\endgroup\$ – Chris Stratton Sep 25 '14 at 15:48

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