CK GL200 Skin Glossmeter Probe
| Brand | CK |
|---|---|
| Origin | Germany |
| Distributor Type | Authorized Distributor |
| Origin Category | Imported |
| Model | GL200 |
| Pricing | Upon Request |
Overview
The CK GL200 Skin Glossmeter Probe is a precision optical measurement device engineered for objective, non-invasive quantification of skin surface gloss—a critical biophysical parameter in dermatological research, cosmetic formulation development, and clinical efficacy assessment. It operates on the principle of directional reflectance spectroscopy, distinguishing between specular (mirror-like) and diffuse (scattered) components of light reflected from the stratum corneum. A collimated white LED beam is directed onto the skin surface at a fixed incident angle of 60°, conforming to standardized geometries referenced in ISO 2813 and ASTM D523 for gloss measurement. The probe integrates dual photodetectors: one aligned to capture the specularly reflected component (gloss signal), and a second positioned to quantify the diffuse-scattered component (matte or subsurface scattering signal). This dual-channel architecture enables simultaneous acquisition of both surface reflectivity and scattering behavior—parameters directly correlated with skin barrier integrity, sebum distribution, hydration state, and topical product film formation.
Key Features
- Fixed 60° illumination/observation geometry optimized for human skin interface, minimizing angular dependency and ensuring inter-laboratory reproducibility
- Dual-sensor optical path design: separate high-sensitivity silicon photodiodes for specular and diffuse reflectance detection
- Collimated white LED light source (400–700 nm) with stable spectral output and low thermal drift over extended operation cycles
- Ergonomic, handheld probe housing with spring-loaded contact ring ensuring consistent pressure and measurement area (Ø12 mm aperture)
- Integrated calibration verification via built-in reference standard; traceable to NIST-traceable ceramic gloss standards
- Compatible with CK MPA and Courage+Khazaka SkinLab platforms for synchronized multi-parameter acquisition (e.g., transepidermal water loss, erythema, melanin)
Sample Compatibility & Compliance
The GL200 probe is validated for use on intact, non-abraded human skin across anatomical sites including forehead, cheek, forearm, and dorsal hand. It supports both in vivo and ex vivo applications—including reconstructed epidermal models (EpiDerm™, SkinEthic™) and porcine skin explants—under controlled environmental conditions (20–22°C, 40–50% RH). Device compliance includes adherence to IEC 61000-4 electromagnetic compatibility standards and ISO 13485 quality management system requirements for medical device accessories. While not classified as a medical device under EU MDR or FDA 21 CFR Part 820, its measurement methodology aligns with ISO/IEC 17025–accredited testing protocols used in contract research organizations (CROs) supporting cosmetic safety and efficacy claims per EU Cosmetics Regulation (EC) No 1223/2009 Annex I.
Software & Data Management
The GL200 interfaces exclusively with CK’s proprietary SkinTest software (v6.2+), which provides real-time gloss unit (GU) calculation, baseline subtraction, and time-series trend analysis. Raw analog signals from both detectors are digitized at 16-bit resolution and sampled at 10 Hz, enabling dynamic monitoring during product application or occlusion studies. Data export formats include CSV and XML, supporting integration into LIMS environments compliant with 21 CFR Part 11 through optional audit trail and electronic signature modules. All measurement sessions are timestamped, user-ID logged, and instrument-serial-number stamped—fulfilling GLP documentation requirements for regulatory submissions.
Applications
- Quantitative evaluation of anti-shine or matte-finish cosmetic formulations (e.g., oil-control primers, translucent powders)
- Assessment of sebum modulation following topical retinoid or niacinamide treatment in clinical trials
- Correlation of gloss changes with stratum corneum hydration levels measured concurrently via capacitance
- Monitoring gloss recovery kinetics post-cleansing or surfactant exposure
- Benchmarking of skin surface texture alterations induced by chemical peels or microdermabrasion
- Validation of packaging-induced film disruption on spray-on sunscreens or moisturizing mists
FAQ
What is the measurement aperture size and how is contact consistency ensured?
The optical aperture diameter is 12 mm, defined by a precision-machined stainless-steel ring. Integrated mechanical springs maintain constant contact force (~200 g), eliminating operator-dependent pressure variation.
Can the GL200 be used on hairy or pigmented skin?
Yes—its 60° geometry minimizes interference from coarse hair shafts, and broadband white light ensures robust performance across Fitzpatrick skin types I–VI without spectral bias.
Is calibration required before each use?
Daily verification against the supplied ceramic standard is recommended; full recalibration by an authorized CK service center is advised every 12 months or after physical impact.
Does the probe support GMP-compliant data integrity?
When paired with SkinTest software configured with Part 11 modules, it supports role-based access control, electronic signatures, and immutable audit trails for regulated studies.
How does the GL200 differ from conventional industrial glossmeters?
Unlike benchtop instruments designed for painted surfaces, the GL200 incorporates skin-specific optical geometry, contact mechanics, and low-light sensitivity optimized for biological tissue reflectance properties—not polished substrates.
