Scoring 3 pass blackout lining

[Schuhby]

I'm not sure if I've mentioned this before but before ironing in a crease in my 3 pass B/O lining I score the wrong side with a fine crochet hook - This helps with folding the fabric ready for ironing. Great for side turnings and hems.

[AMANDA]

Which is the wrong side of 3-pass blackout? The smooth side, or the woven side?

[Cat]

Hi Amanda,

The smooth side is the wrong side.

Cat

[AMANDA]

Thanks, Cat!

Also, another question about 3 passblackout .... I am going to use it for some blackout face-fixed cascade roman blinds and after reading all the forums, I have decided to use the blackout as an interlining , but my question is, can you use it sideways (across its grain) or do you have to use it lengthwise? If it's a bonded type of fabric, is there a difference between its cross grain and its lengthwise grain?

Thanks,
Amanda

[AMANDA]

..... and also, presumably you don't have to interlock the blackout layer on a roman blind, because the stab stitching will hold all three layers - face, blackout and lining - in place?
Thanks again.

[janie]

Yes to both of those Amanda. Its quite stable to railroad the lining, and stab stitching holds it all in place.
Janie

[AMANDA]

Thanks! I've never heard the expression "railroad" the fabric. I like it! Especially as with 3 pass blackout it seems that many people would like to throw it in front of a train and leave it there forever...
Amanda

[Cathie]

Ha! well said Amanda. Give it it's due, it is fantastic for its purpose, and nice and heavy and drapey, but hell to sew.