Half Square Triangle Tricks – Trimming
Just a quick warning concerning last week’s post. May wrote to say that the “ripper perch” looked a bit dangerous. We should always be careful with any of our tools, but I wanted to assure you that I keep the ripper’s cover on it when not in use.
As I mentioned last week (click here for that post), the center of the quilt that I’m working on contains 336 – 3″ finished half square triangle blocks (there will be more needed for the border). They’re pressed and cut apart and now it’s time to trim.
I find the most time consuming part of trimming is aligning the ruler for every cut. That prompted me to get a Bloc Loc™ ruler – and I’m very happy with it.
This ruler has a groove on the bottom for the seam allowance to nest in.
This means the seams must be pressed to the side. To begin I lined up the Bloc Loc™ groove on the seam, and centered it on the block (I’m trimming my blocks to 3 ½”).
I rotary cut the top and right sides:
Next comes the tricky part. The ruler and block need to be rotated to trim the other sides. I began with a “lazy susan” style cutting mat, but it was awkward and didn’t turn easily. Then I decided to try one of the mini cutting mats in my collection. I found this one spun quickly on my table. It worked great! So here it is rotated:
I simply slid the ruler down the seam allowance to the correct measurements:
and rotary cut the remaining two sides:
The best way to get great points when making half square triangle blocks is to be sure the diagonal seam drops off the block at the exact corners. The groove on this ruler guarantees it!
It’s amazing how long it takes to trim that many blocks, but I am really pleased with how accurate they all are:
After my last post Nancy commented that she likes using the Clearly Perfect Slotted Trimmers™ for squaring up her half square triangles. I’ve watched a You Tube video on them and I think I may need to give them a try – to compare them with the Bloc Loc™. Stay tuned.