Things I wish my Mum had told me, about interfacing.
Now stocked as part of our permanent range, we have interfacing in 120gsm, 150gsm and 200gsm.
Lets start with the 120gsm.
This will be your most used interfacing. When PDF bag patterns call for SF101 or medium weight interfacing, this is what its asking for.
Woven cotton, with a glue backing. Adhere to the wrong side of your fabric with an iron or heat press. It adheres super fast, doesn't need a lot of heat but prefers a bit more pressure.
This will give your fabrics a bit more strength, without thickening them too much.
Next weight up is the 150gsm
The 150 gsm is more off white, than pure white, its quite stiff. Its probably the closest product I have found, to Decovil light.
Its still easy to adhere, gives your fabrics a firm hand. Its place is probably more on your exteriors. Its not suitable for folded pieces like card slots. I like this weight, when I sew with quilting cotton. I have used it on canvas, and left off the foam in several makes.
The heaviest weight is the 200 gsm. This is heavier than the 120 but not as stiff as the 150 gsm. Its thicker than both, but more pliable.
The 200 gsm will turn your quilting cottons into a more canvas feel. Its probably more suited to exteriors, but if you prefer a heavier lining in your bag, then you will love this one.
Its very hard to see in the pictures, but the weave of the cottons is different. All of the bases are a quality woven, with extra glue on the back which makes fusing a breeze.
Your patterns may call for various interfacings on each section of the bag. Decovil aside, one of these woven interfacings will pretty much meet all your needs.
I personally don't use anything else. I rarely use Decovil, even if the pattern calls for it.
From a small business perspective, these products are affordable and will keep your supplies costs down.
You can find them all here
https://australianbagmakingsupplies.com.au/collections/decovil-and-woven-interfacing