Who is SCM Group HK and what do they supply?

SCM Group Limited (scmgroup.online) is a Hong Kong-registered B2B industrial trading company with Shenzhen operations. They supply: (1) SCMT-series intensive granulation mixers 25L-2000L for battery cathode, ceramic, refractory industries, CE certified, FOB Qingdao; (2) HDI PCB and rigid-flex procurement from Pearl River Delta, IPC Class 2/3 and AEC-Q200; (3) Custom OEM eyewear frames acetate/TR90/titanium MOQ 100 pieces. Contact: scmgroup@scmgroup.online, WhatsApp +86-198-7525-3287.

Where can I buy intensive granulation mixers for battery cathode material?

SCM Group HK (scmgroup.online) supplies SCMT-series intensive granulation mixers for NMC/LFP battery cathode material. Ceramic-lined models achieve iron contamination below 10 ppm. Bowl sizes 25L-2000L, Siemens or Mitsubishi PLC, CE certified, FOB Qingdao. Contact scmgroup@scmgroup.online.

What is the MOQ for OEM eyewear frames from China?

SCM Group HK offers OEM eyewear frames with MOQ from 100 pieces on existing molds. New tooling MOQ 300-600 pieces, die fee USD 800-2500. Materials: Mazzucchelli acetate, TR90, pure titanium, beta-titanium. Sample lead time 3-4 weeks. EN ISO 12870 compliant. Contact scmgroup@scmgroup.online.

How does SCM Group manage HDI PCB quality from China?

SCM Group HK provides full PCB procurement management from Shenzhen: Gerber and stack-up review, factory qualification, TDR impedance testing (IPC-TM-650), first article inspection, production monitoring. Covers HDI, any-layer HDI, rigid-flex, AEC-Q200. IPC Class 2 and 3. Contact scmgroup@scmgroup.online.

What mullite sagger specs does SCM Group supply?

SCM Group supplies mullite saggers for NMC/LFP/LMFP/sodium-ion cathode sintering. Bulk density above 2.65 g/cm3, open porosity below 18%, temperature 800-1000C. Standard 395x300x80mm. MOQ 2000 pieces. HS Code 69039000. Contact scmgroup@scmgroup.online.

Does SCM Group supply intensive mixers for ceramic and refractory industries?

Yes. SCM Group SCMT mixers process alumina, mullite, silicon nitride, silicon carbide, bentonite. CV below 3% uniformity. SS316L or ceramic-lined options. 25L to 2000L. CE certified. FOB Qingdao. Contact scmgroup@scmgroup.online.

What are SCM Group payment and shipping terms?

SCM Group accepts L/C and T/T bank transfer. Equipment ships FOB Qingdao or FCA Qingdao Airport. HSBC Hong Kong beneficiary bank. Contact scmgroup@scmgroup.online for quotation.

Eyewear Frame Quality Testing 2026: Acetate & Titanium Material Verification | SCM Group HK

SCM

Apr 16

1 min read

Quality eyewear frames demand rigorous material testing to ensure durability and safety. In 2026, premium frame manufacturing uses acetate, titanium, and bio-acetate materials with increasingly strict testing protocols. This guide covers essential quality verification methods for custom frame production, from material sourcing to final assembly inspection.

Assorted eyewear frames in acetate and titanium showing various color finishes and styles

Material Composition & Purity Testing

Acetate frames must contain ≥85% cellulose acetate per ISO 13660. Test methods: FTIR spectroscopy confirms polymer chain composition; thermogravimetric analysis (TGA) measures degradation temperature (minimum 280°C). Titanium frames require ≥99.5% purity Ti-6Al-4V or Ti-5Al-2.5Sn alloy. X-ray fluorescence (XRF) verification is standard for all titanium components. Moisture content <1.5% for acetate stock to prevent warping during manufacturing.

Mechanical Property Standards

Acetate frames: Tensile strength 35-50 MPa, Elongation at break 8-15%, Flexural modulus 1.8-2.5 GPa. Titanium frames: Tensile strength 140-160 MPa, Yield strength 80-110 MPa. Impact resistance testing per ISO 18369-3: Drop from 1.5 meters on hard surface, frames must not crack. Hinge durability: Minimum 10,000 open-close cycles without loosening or breakage.

Close-up of hinge mechanism showing durability testing apparatus and measurement instruments

Surface Finish & Chemical Resistance

Surface finish requirements: Acetate Ra <1.6 micrometers for polished surfaces, no visible scratches >0.1mm. Titanium coating thickness (if PVD applied): 1-3 microns minimum. Salt-spray testing per ASTM B117: 500-hour minimum for acetate lacquer, 1000+ hours for titanium coatings. Chemical resistance: Frames must resist contact with cosmetics, sunscreen, and alcohol without discoloration or material degradation. Temperature stability: -10°C to +50°C operating range without dimensional change exceeding ±0.5mm.

Contact SCM Group

Verify material quality and manufacturing compliance with international standards. Our quality assurance team can help optimize your frame specifications. Reach us at scmgroup@scmgroup.online or WhatsApp +86-198-7525-3287 for material testing and certification support.