7-STAGE QUALITY CONTROL & OPTICAL AUDIT SOP
DAG BAU GmbH Standard Operating Procedure for Secondary-Market Card Vault Storage & Fulfillment.
Stage 1: Primary Intake & Official Registry Validation
Every card slab received is cross-referenced with PSA, BGS, or CGC official cloud database. Cert ID, card designation, and grade parameters are cryptographically logged.
Stage 2: Dual 365nm UV Luminescence Audit
High-intensity ultraviolet illumination inspection to detect any aftermarket tampering, glue re-adhesion, or unsealed casing fractures.
Stage 3: Ultrasonic Sonic Weld Verification
Inspection of the perimeter hermetic sonic weld ensuring the slab casing has never been pried or split open.
Stage 4: Anti-Static Vault Storage & Climate Control
All inventory is stored in heavy-duty steel lockboxes in a humidity-controlled (45% RH) and temperature-regulated (20°C) physical vault at Hammer Str. 19, Düsseldorf.
Stage 5: Tamper-Evident Packing & Courier Dispatch
Fulfillment station utilizes custom foam sleeves, shockproof corrugated mailers, tamper-evident security tape, and tracked DHL Paket 24-hour service.