Acetone solvent welding – safest solvent for acetate. You brush the acetone onto the joint surfaces, press them together, and the acetone partially dissolves the acetate surfaces so they actually fuse together as it evaporates. This creates joints that can achieve 80-100% of the strength of the original material
Include ways of joining to card – double sided tape, staples
Also slot in methods, where card backing slots into plastic lip
Mechanical Fastening
Many people actually prefer mechanical methods like brads, eyelets, staples, or even stitching because they’re more reliable long-term.