Types of Stiffeners and Interfacing in Bag Making | Eris Atelier

So in simple words interfaces and stiffeners act as the skeletal framework of every bag. Most times a bag cannot stand on its own so adding a stiffener gives it that structure and this gives your project a more professional look.

QUESTIONS-
Lindsey Barlow
Understanding bag stiffeners and reinforcements

Deshola leather works
Please what type of interface do you use for the sides of the bag?
ANSWER- For the sides, I used 1mm thick chipboard

Lamidi Oluwatunmise
Can a manual machine sew this (hard paper board/ kariboard) perfectly??
ANSWER- Domestic sewing machines can sew through softer stiffeners and interfaces but I am sure the needle may start to struggle through thick/heavy stiffeners

Oluwatosin Bamidele
PLS ma, Is maco and fibre the same thing as chipboard? Thank you
ANSWER- Nope they're all different



TYPES OF STIFFENERS & INTERFACE
Soft foam (a.k.a mattress foam)
EVA foam / ethylene-vinyl acetate copolymer foam ( a.k.a mako)
EPE foam / Expanded Polyethylene foam - waterproof foam
Cellulose board is mainly used for insoles but is great for structured bags.
Chipboard
Iron-on interface of varying thicknesses


WHAT ARE THE BEST TIMES TO USE THESE INTERFACES AND STIFFENERS?

IRON ON INTERFACE- Soft fabric tote
SOFT FOAM- quilted bags, soft kiddie bags, Camera/gear bag
EVA FOAM/MACO- Medium soft tote bag,


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EPE FOAM/WHITE FOAM- school bags, gear bags
CELLULOSE BOARD OR KARIBORD- Structured bags, men's briefcase
CHIPBOARD- Sides of structured bags