Points should be noted when purchasing mental in the market:
Coating
Chrome-plated parts, coating should beautiful and smooth, like a mirror. The coating does not bubble and can not be rust, non-exposed yellow, should not be scratched.
Titanium alloy plated parts, color can not be white, especially reveal the white part. Others are some with chrome plating.
Spray parts, coating non-shedding, no knots, no creasing, and no rust spots. It also needs to be clean and delicate.
Folding metal pipe and riveting part
Metal pipe section, should not be overlapping seam, crack, open welding, pit; curvature can not have creases, arc should be smooth; soldering should not be cold solder joint, leakage welding, welding clothing, pores, residual welding head, burr and shall be polished smooth: smooth wall surface shall be smooth, fluid feel.
Riveting, should be solid not loose rivets should be smooth and round and around without smashing marks or glitches.
Fold, should be combined easy to open and close, but the tight loose, but just right. Folding beds, chairs, stools, sofas, tables, etc. is open, legs should be at the same horizontal plane.
