Qinbrolly
中文

Thangka pendants & Gau boxes

Gau Box (Pendant Box / Amulet Case)

A small hinged or screw-top zinc alloy case worn as a pendant, used to hold a sacred item or image. The box body and lid are die cast in-house; the hinge, insert, chain and any enamel are sourced from the supply chain; final assembly into the closed box is done in-house.

Overview

Made by
Qinxi in-house
Materials
Zinc alloy (Zamak 3 / Zamak 5) body and lid, Brass hinge or screw thread (sourced), Paper / printed insert (sourced), Glass or resin window (sourced)
Finish options
Antique brass, Antique silver, Gold plating, Gunmetal, Enamel fill
Customization
Box shape and size, Closure type (hinge, screw, clip), Relief and plating / enamel colour, Cord, chain or split-ring attachment

Applications

  • Gau boxesWorn as an amulet case on a cord or chain
  • Pendant necklacesWorn as a statement pendant
  • Keychains & charmsFitted with a split ring as a charm

Selection tips

  • Choose hinge versus screw versus clip closure against how often it is opened; a screw top seals best but is slow to open.
  • Specify the insert: a printed card is cheaper than a hand-painted one and keeps the box's contents flexible.
  • Jewellery is held to stricter lead and cadmium limits than umbrellas; confirm REACH Annex XVII and CPSIA thresholds with the buyer.
  • EU skin-contact items need nickel-free plating to meet REACH nickel-release limits.

Manufacturing process & quality control points

Qinxi in-houseSupply chain / partnersIn-house or supply chain
  1. 1

    Box design & tooling

    Qinxi in-houseZinc & Aluminum Alloy Die Casting

    Qinxi owns the 3D model and the dies for the box body and lid, so they are made in-house. The hinge, insert, window and cord are specified at the enquiry stage and sourced from the supply chain.

    Quality control points

    • Lid and body fit, closure type · Engineering review of the tool · Each new tool or project
  2. 2

    Zinc alloy die casting of body and lid

    Qinxi in-houseZinc & Aluminum Alloy Die Casting

    The box body and lid are die cast on Qinxi's own line, de-gated and tumbled. The sealing lip and any relief are the visible and functional surfaces, so fill and flash there are checked.

    Quality control points

    • Fill and porosity at the lip and relief · Visual check under 600-1000 lx, 300 mm distance · First 5 pieces per cavity per shift
    • Lid-to-body fit · Fit check with go/no-go gauge · First article + every 2 hours
  3. 3

    Plating and enamel

    Supply chain / partners

    The box is plated and recesses may be filled with enamel. Plating is outsourced to the supply chain; thickness and corrosion are verified against the agreed specification.

    Quality control points

    • Coating thickness · XRF coating thickness gauge (ISO 3497 / ASTM B568) · One set per plating colour per batch
    • Enamel bubble and adhesion · 10x loupe; tape adhesion test · Per lot, AQL 2.5 (ISO 2859-1 general level II)
  4. 4

    Hinge / insert fit and assembly

    Qinxi in-house

    The hinge or thread, insert and window are fitted and the box is assembled and closed. This final assembly is done in-house; the closure must open and close cleanly and the box must not rattle when worn.

    Quality control points

    • Closure action and insert fit · Manual open/close cycle x10; feel for rattle · Per lot, AQL 2.5 (ISO 2859-1 general level II)
    • Pull on the attachment · Pull gauge on the cord/chain loop · One sample set per batch

Relevant compliance

Get a quote for gau box (pendant box / amulet case)

Custom shapes, finishes and logos. Email us your artwork or sample photos.

Request a quote