You may or may not know that I came to cardmaking via bookbinding. If you've ever gotten serious about bookbinding yourself, you understand completely why Omnigrid quilting rulers (in various sizes), a craft knife, and cutting mats (in various sizes) are essential tools in my paper crafting studio.
If you've never gotten into bookbinding, however, these tools might seem a little strange, especially when you learn that I've never made a quilt--or even a quilted table runner--in my life.
Bookbinders need to cut paper and book board at precise right angles and precise measures. They often work with giant sheets of paper that won't fit into a standard 12" rotary or guillotine paper trimmer. Omnigrids are incredibly useful for these circumstances, especially when combined with long metal rulers and box cutters for heavier jobs.
These days, my six-inch Omnigrid square works perfectly for most cardmaking needs. Any time I need a mat (for those rare layered cards) or to cut a piece for white-on-white layering (much more common), I reach for the knife and Omnigrid. The cutting mat (a large one, though not my largest!) lives permanently on my desk. The see-through design of the Omnigrid is perfect when I need to cut a strip with a sentiment and want even borders surrounding it, for instance.
A word of warning: knives cut paper, but they also cut fingers. In 13 or so years of using these, I've only nicked my finger nails a few times, but as long as you keep your fingers away from the edge, you should be okay. Also, after 13 years, you don't want to start to feel over-confident, brag on line that you've never cut yourself, and then find yourself at the ER getting stitches. How embarrassing!
Thankfully, this hasn't happened yet, although I don't want to get cocky. Pride goeth before a fall...and I don't want to get stitches.
Anywho, these are useful tools I work with all the time. It's easy to take such unglamorous items for granted, but seriously, they make my crafting so much easier.
Just remember to keep your fingers safe.
Oh, and if the knife rolls off your desk, don't reach to catch it. Let that puppy hit the floor. 'Cause you know you'll get stabbed and might get blood on your card stock, which will ruin it.
It would, after all, be weird to try to make background paper with real blood stains. Right?