While working on my Dare to Dresden quilt, I decided I wanted to have a Rainbow-striped binding for it using some of my hand-dyes.
Here is how I did it:
I first cut 2” strips (22” strips) of each of my fabrics and then I sewed them together along the long edge of the strip – staggering them 2” from the end: I only put six strips together like this to make cutting easier later.
I made sure to press each seam open. This reduces the bulk. I do this when joining my binding regularly anyway.
The next step (no photo, sorry) is to take a longer ruler and line up the 45-degree mark with one of the seams and cut the staggered ends off creating your strait line. Then it is just as simple as cutting each bias strip 2-1/2”. To keep it accurate, line the 45-degree mark up on a seam to make sure your angle is still accurate.
Once your strips are cut, ,then just join your strips together end to end as you would normally for bias binding strips, pressing seams open.
If you have more colors/fabrics that you want to use (for instance in a 12-step rainbow), just make different sets of strips and then join them together when making the length of the binding, alternating strip sets, continuing until you have enough binding to complete the perimeter of the quilt.
Once you have your binding strip made ( folded and pressed in half) – here are some tips to help you attach it easier:
Leave a 12” opening with 12” tails on both ends for joining the binding seamlessly. I use “the binding tool” for joining the ends of my binding together. Instructions can be found on the tool.
I also sew with a 3/8” seam. I like my bindings to be tight, but completely filled and even. This is how I get them and still able to get crisp mitered corners:
First, take a square post-it note and fold it in half diagonally. I place it in the corner as below and sew to the post-it note.
Follow the stitching along the edge of the post-it note to the corner of the quilt.
Take the post-it note and flip it to lay in this direction below.
Use the post-it note as a guide for folding: Flip the binding fabric as the photo below and fold it there. As you are holding the fabric down in that position, carefully pull out the post-it note.
Place the post-it note in the corner of the quilt as below. Again, use the edge of the post-it note as a guide to fold. Flip the binding back along the edge of the quilt
Flip the binding back along the edge of the quilt.
Carefully pull out the post-it note. Until you get really good at holding this edge without pins, I suggest pinning the binding down. This creates a nice, even fold for the miter.
Now you just sew from the edge all the way to the next corner where you repeat the steps above.
I have been doing my binding like this for over a year and have not had a horrible corner, even when a seam ends up in the corner like it seems to inevitably.