Shirt collar interfacing

[Dreamofgilgamesh]

Dear group, I have found someone who is a whizz at sewing and she says that she can make me a detachable shirt collar if I give her one to copy. I have a Van Heusen spear point collar which has seen better days that would fit the bill. My tunic shirt is a TM Lewin in fine white Poplin. I can source the Poplin easily enough but from what little I know about such things the collar needs to have an "interfacing" to give it a bit more body do to speak. So, what exactly is interfacing?
Is there some kind soul who could explain what it is please, and if possible supply me with a link so I can see what it is? Even better would be a link to a UK supplier. Thanks very much chaps.

 

[Nick D]

Interfacing is just an extra layer of fabric to give something more body, stiffness, etc. Sometimes for a shirt it can be simple, plain cotton or something stiffer. It depends on the desired effect, the fabric of the shirt, and the methods of the one sewing.

The Lining Company has shirt interfacings here: http://www.theliningcompany.co.uk/catalog/index.php?cPath=33_82
MacCulloch and Wallis has some as well: http://www.macculloch-wallis.co.uk/Category.aspx/Interlinings

 

[Dreamofgilgamesh]

Ah thanks Nick that's great, much appreciated.