ISO 10216:2017 PDF

Anodizing of aluminium and its alloys — Instrumental determination of image clarity of anodic oxidation coatings — Instrumental method

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Title (English):

ISO 10216:2017

Anodizing of aluminium and its alloys — Instrumental determination of image clarity of anodic oxidation coatings — Instrumental method

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 9
Publication date:: October 9, 2017
Edition:: ISO IS 10216 edition 3 version 1
ICS:: 25.220.20

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Description (English):

ISO 10216 specifies an instrumental method for determining the image clarity of anodic oxidation coatings on aluminium and its alloys by measuring reflection from the surface with the help of a sliding combed shutter. The test can only be applied to a flat surface which can reflect the image onto the limited combed shutter and photo-receiver. This method can also be used to measure the optical evenness of anodic oxidation coatings on aluminium and its alloys.

Technical details

Technical committee: ISO/TC 79/SC 2 - Organic and anodic oxidation coatings on aluminium
SKU: ISO 10216:2017

Abstract

Overview

ISO 10216:2017 specifies an instrumental method for measuring the image clarity of anodic oxidation (anodized) coatings on aluminium and its alloys. The method uses an optical comb (a sliding combed shutter) and a photo‑receiver to quantify how clearly a surface reflects an image. It applies only to flat, reflective surfaces and can also assess optical evenness and light dispersion of anodic coatings. The instrumental approach provides more repeatable and objective results than visual inspection and is suitable for quality control and dispute resolution.

Key Topics and Requirements

Principle: A slit illuminated and collimated is reflected from the specimen set at 45°; the reflected slit image is analyzed through a sliding combed shutter and measured by a photo‑receiver.
Image clarity (C): Calculated as C = (M − m) / (M + m) × 100, where M is maximum light intensity and m is minimum light intensity. Image clarity is expressed as a percentage.
Optical evenness (E): Expressed as the ratio of transverse and longitudinal image clarity values (E = S / L), indicating surface irregularities.
Dispersion of light (D): Measured to quantify light scattering by the coating (formula and use are defined for higher classes).
Apparatus essentials:
- Specimen set at 45° to incident light
- Collimating/de‑collimating lenses (focal length ~130 mm)
- Light source (filament ≤ 0.05 mm)
- Slit (≈0.02 mm ± 0.01 mm width)
- Combed sliding shutter with 1:1 transparent/opaque ratio; widths: 0.125, 0.25, 0.5, 1.0, 2.0 mm
- Photo‑receiver and black glass conforming to ISO 7668
Specimen preparation: Representative flat area (standard size ~50 × 50 mm), clean, and prepared under the same anodizing/sealing conditions as the product.
Classification (using 0.5 mm comb, larger of transverse/longitudinal values):
- S: C ≥ 90 (mirror finishes)
- A: 90 > C ≥ 70 (glossy)
- B: 70 > C ≥ 30 (low glossy)
- C: C

Related standards

Mentioned in the description and other ISO standards

Overview

Key Topics and Requirements

Principle: A slit illuminated and collimated is reflected from the specimen set at 45°; the reflected slit image is analyzed through a sliding combed shutter and measured by a photo‑receiver.
Image clarity (C): Calculated as C = (M − m) / (M + m) × 100, where M is maximum light intensity and m is minimum light intensity. Image clarity is expressed as a percentage.
Optical evenness (E): Expressed as the ratio of transverse and longitudinal image clarity values (E = S / L), indicating surface irregularities.
Dispersion of light (D): Measured to quantify light scattering by the coating (formula and use are defined for higher classes).
Apparatus essentials:
- Specimen set at 45° to incident light
- Collimating/de‑collimating lenses (focal length ~130 mm)
- Light source (filament ≤ 0.05 mm)
- Slit (≈0.02 mm ± 0.01 mm width)
- Combed sliding shutter with 1:1 transparent/opaque ratio; widths: 0.125, 0.25, 0.5, 1.0, 2.0 mm
- Photo‑receiver and black glass conforming to ISO 7668
Specimen preparation: Representative flat area (standard size ~50 × 50 mm), clean, and prepared under the same anodizing/sealing conditions as the product.
Classification (using 0.5 mm comb, larger of transverse/longitudinal values):
- S: C ≥ 90 (mirror finishes)
- A: 90 > C ≥ 70 (glossy)
- B: 70 > C ≥ 30 (low glossy)
- C: C

ISO 10216:2017 PDF

Technical details

Abstract

Overview

Key Topics and Requirements

Related standards

Abstract

Overview

Key Topics and Requirements

Related standards

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