Thank you for your great tutorial, this is the third Roman blind I am making. I noted that from one of your photos you made a blind using Peony & Sage fabric, Falling Feathers in the Duck Egg colour way. I am slightly colour blind and am having a problem finding a matching Duck Egg thread, would you be able to advise what one you used please as I am beginning to pull my hair out!
I'm afraid we don't know which one we used and haven't got any of that fabric in the workroom. You'll need to take a sample of the fabric into a haberdashery shop with a range of threads and I'm sure a staff member will be able to help you colour match.
if you are stitching through the combined blackout/interliner in all these places - my past experience with this fabric is there are many pinholes of light showing through at every stitch. In my innocence in making a previous blind with interlining I lockstitched it as for curtains. If I did this locking just the fluffy layer would it hold it still?
No the front face fabric will sag and not pull up evenly. You have to stab stitch through all the layers.