China Testing & Certification International Group Co., Ltd. (CTC, Stock Code 603060) originated from the testing and certification business of China Building Materials Academy in the 1950s. After 70 years of unremitting efforts and persistent pursuit, the company has formed five business categories: detection and testing, certification and evaluation, testing instruments and intelligent manufacturing, measurement and calibration, scientific research and technical services, committed to providing customers with technical services and comprehensive solutions of detection and testing, certification and evaluation, appraisal, consultation, training, and instruments and equipment in fields of quality, environmental protection, green, safety, health, and energy conservation.

CTC provides comprehensive testing and certification services in the gypsum board field, covering various types including paper-faced gypsum boards, paperless gypsum boards, hollow gypsum partition boards, and decorative PVC gypsum boards. Testing items include chemical composition (elemental sulfur, sulfide, sulfite, sulfate, calcium oxide), basic physical properties (surface density, breaking load, impact resistance, bond strength between facing paper and core, dimensional deviation, hardness, etc.), special performance indicators (fire resistance rating, flame retardant rating, fire stability under direct flame, water absorption rate), as well as environmental safety indicators (formaldehyde emission, heavy metal content, radionuclide limits).
Gypsum Boards
Sulfite
Sulfide
Elemental Sulfur
Sulfate
Soluble Anhydrous Calcium Sulfate
Calcium Sulfate Hemihydrate
Calcium Sulfate Dihydrate
Gypsum Boards:
Paper-faced gypsum boards, paperless gypsum boards — GB/T 37219-2019, T/CBMF 67-2019
Extensive experience in the testing of gypsum boards and other gypsum products. The company has applied for multiple invention patents and has developed several national and group standards in this field.
Led the testing efforts during the "U.S.-China Gypsum Board Incident," facilitating international recognition of Chinese gypsum board products and resolving a major trade dispute.
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