When sourcing from an ID card factory, you must prioritize chip technology and material durability. For security, specify whether you need LF (125kHz), HF (13.56MHz/NFC), or UHF (860-960MHz) chips, such as MIFARE, DESFire, or HID compatibility. The material should ideally be high-quality PVC, PET, or Polycarbonate (PC) to prevent delamination. Ensure the factory supports offset printing (CMYK) for high-resolution graphics and offers security features like holographic overlays, UV fluorescent inks, and micro-text to prevent counterfeiting.