Overview - ISO 12505-1:2014 (Skin barrier for ostomy aids - Test methods)
ISO 12505-1:2014 specifies laboratory test methods for the face plate of skin barriers used with ostomy aids. It defines how to measure physical dimensions (size and thickness), surface pH, and water absorbency of skin barrier faceplates. The standard is intended to provide repeatable, comparable test procedures for manufacturers, test laboratories, procurement specialists and clinicians evaluating ostomy products. It does not cover clinical or biological safety testing (cytotoxicity, sensitization, microbiological effects, etc.).
Key topics and technical requirements
- Scope: Applies to the face plate of skin barriers for ostomy aids; excludes medical/biological properties.
- General test conditions: Follow ISO 554 standard atmosphere (preferred 23 ± 2 °C and 50 ± 5 % RH); samples conditioned ≥24 h.
- Sample protocol: Measurements are normally performed on at least three samples and reported as averages.
- Size and shape measurement:
- Describe faceplate shape (circle, oval, square, etc.), cross-section (flat/convex) and edge/fringe type.
- Use a scale ruler, caliper or diameter gauge; thickness measured with a dial thickness gauge (0.1 mm resolution) using a defined flat contact area and a specified pressure (12 kPa).
- Rounding rules: length/diameter reported in mm (integers); thickness to 0.1 mm.
- Surface pH:
- Measured after immersion in 0.9 % NaCl saline for 4 h at 37 ± 1 °C using a flat pH electrode (per ISO 10523 procedures); results reported to one decimal place.
- Water absorbency:
- Fluid absorption capacity assessed by exposing the skin-contacting surface to saline under defined conditions (test inspired by EN 13726–1); results typically expressed per area (mg/cm²) and rounded to integers.
- Test reporting: Procedures and results, including any deviations from standard conditions, must be documented.
Practical applications
- Enables objective comparison of skin barriers by size, pH compatibility with peristomal skin, and fluid handling (sweat/exudate).
- Supports product development (design verification), quality control, supplier evaluation, and procurement decision-making.
- Helps clinicians and wound/ostomy care teams select skin barriers with appropriate physical and surface properties for patient care.
Who should use this standard
- Medical device manufacturers (R&D, QA)
- Independent test laboratories and conformity assessors
- Hospital procurement and clinical specialists in ostomy care
- Regulatory bodies evaluating device performance claims
Related standards
- ISO 12505-2 (Skin barrier - Wet-integrity and adhesive strength)
- ISO 554 (Standard atmospheres)
- ISO 10523 (Water quality - pH)
- ISO 24214 (Skin barrier vocabulary)
- EN 13726-1 (absorbency test methods referenced)
Keywords: ISO 12505-1, skin barrier, ostomy aids, test methods, surface pH, water absorbency, size measurement, thickness gauge, saline immersion.
Open preview (PDF)Skin barrier for ostomy aids — Test methods — Part 1: Size, surface pH and water-absorbency
