Review metal chair frames through material identity, cutting, bending, weld fixtures, finishing and interface measurement with a practical process control map.
Separate foam density, firmness, thickness and molding route, and calculate material mass before specifying a seat cushion and evaluating the complete assembly.
Compare mesh, woven fabric and PU upholstery through actual construction, cleaning, abrasion methods, hydrolysis evidence and replacement cost. Includes an ACT guideline table and material approval checklist.
