i use my cork-backed ruler that way when i am cutting things with an xacto... two reasons: 1) it places the metal part of the rule directly on the surface for a more precise cut, 2) i get a better grip and more control of the rule with the cork side up...

i do it when i'm trying to cut something very precisely (i.e. a model or trimming pages for a book, etc).

because the cork lifts the ruler off of the cutting surface slightly, there is a greater chance for the xacto blade to cut slanted, or wiggle. when i use the ruler upside-down, i am more likely to get a straight, perpendicular, clean cut.

Thank you for such quick responses. The reason I ask is that in my previous architecture course (undergrad) students and even my professor, looked at me strange for doing so.

I thought the same the thing in that the cork elevates the ruler giving me more control over the contact between the xacto/pencil and with what's beneath the ruler.

The cork backing prevents slipping. A slipping metal ruler can result in injury from the blade or damage to what you are cutting (glossy photos, etc)
If neither is a concern for you then you have the right to obsess over an obliqued cut......

Isn't that such a great metaphor?

I love pain...what's wrong with a little risk taking?

why buy two when you can just flip it over as needed? it saves the environment!

or, buy an all metal edge and put a continuous strip of drafting tape (or two if you really want to be adventurous) on the back for the same purpose. Replace as necessary, or remove at will.

pennies on triangles......what chu' know 'bout that...hahaha

Good for Ink on Mylar. Tape will do for Vellum.

I feel privileged. I didn't have to buy my cork-backed ruler.

...as the vellum does absorb the ink quickly. More height is needed for the Mylar, as the ink is pooled longer.

minor infraction: whack with cork side.
major infraction: metal side.

I use the side of my forearm as a straight edge. It gives it that human touch, and the tinge of blood on my projects is just an added bonus!

ahaha, damn cryzko, i used to tape pennies to my triangles too.

we used dimes................

cork side up - I prefer my hand not slipping from the ruler also avoids amateur-looking cut-lines.

I do know a lecturer (old school) who used to rip them off in favour of electric tape - said it gliding easier, he also did this on his set squares. It does work though - not worth the effort the tape actually leaves a residue of glue on your work

pocz was a baller...... made the price of that triangle go up 30cents....

The backing is not to make the ruler non-slip as much as it is to prevent ink from bleeding under the edge of the ruler due to capillary action. That's also why set-squares etc have a slight chamfer or step along the edge.

OR you could just use the ruler properly and keep your hand straight as you cut to avoid obliques. Hint: Use XACTO not OLFA and make multiple light cuts not a few heavy cuts.

If you can find a Catholic Nun ask her what is the right way to use a ruler.

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