I use a metal 2 foot ruler and an exacto knife.

batcave@dma.net wrote in news:1106982411.389349.182440
@z14g2000cwz.googlegroups.com:

I use a plastic craft ruler that has a metal cutting edge.  Mine is a
clear plastic, about 2 inches wide, and with a pattern printed on it with
1/8 inch squares that allow me to align the ruller with the edge of the
image and trim the border of the print.   Not a common ruller - found it
in a craft store.

I used to use an xacto knife, but that leaves a rough edge.  The solution
to the rough edge is a "boning tool" - basically a piece of plastic that
you rub along the cut edge to smooth it down.  The handle of an old
toothbrush also works.  This combination works, but I find that there is
a tendency for the boning tool to slip away from the edge and leave an
impression in the face of the print.

Now, however, I use an Olfa rotary cutting tool.  These can be purchased
at arts and craft stores, but I found them to be much less expensive in a
discount fabric store.  The advantage of the rotary tool is that it
remains sharper (although the blade is replaceable), and they don't leave
a rough edge that requires boning.

Relatively inexpensive: Fiskars rotary trimmers
The trimmer has been redesigned; my older model is a tad sloppy, poorly
ruled.
As long as I trim one sheet at a time, I do ok.
Better trimmers cost more.

No matter how "square" (true to 90-degree cuts) the cutter, please remember
that printers
sometimes grab the paper slightly askew, so the final print is an
imperceptible few degrees
off parallel with the edge of the paper. The Fiskars I use makes it
impossible to judge until
after the cut is made, requiring reprinting.

I don't have space to store a guillotine cutter, so I use an inexpensive Xacto trimmer that folds into small space.

I use det cord,  nice straight line and a black one at that