What’s This...

[Efemera]

It’s about 30 inches wide with selvedges..to me it looks like some kind of tailoring interfacing but some one may know better..I’ve yards of it and looking to sell but need to know what it might be first.

[Acorn]

I think it could be tapestry fabric - less cotton-y than aida, and stiffer.

[Efemera]

No..it’s not either of those.

[Surest1tch]

At first glance I thought it could have been some sort of synthetic canvas for chest pieces but when I blew it up I knew it couldn't have been. I was tailoring for nearly 30 years and never saw or used anything like that.
Could it have been used for those sticky out petticoats that were so popular in the 1950's?

[BrendaP]

Given that it's only 30 inches wide I think that you are probably right in thinking that it's some sort of tailoring interfacing.

I think it might be described as mull ?
https://www.macculloch-wallis.co.uk/c/840/non-fusible-woven?p=1&q=840&me=p
https://www.macculloch-wallis.co.uk/p/4154/non-fusible-woven/mw/mulltarlatan

Is it very stiff like this
https://vintagepaper.co/products/bookbinding-spine-mull-aka-tarlatan-crash-super

[Efemera]

It does indeed look like mull...I’ll put it in the For Sale forum.