GB/T 15610-2008Method for visual appraisal of metamerism (English PDF)

3.1

When the sample was visually evaluated object colors, geometric positional relationship between the light source and the illumination of the human eye and color samples between different from the color measurement instrument geometry condition.

4.1 evaluation standard illuminant

Using standard light source and simulate D65 illumination of the evaluation of A.

4.2 colorimetric conditions

4.2.1

Evaluation of the field of view is greater than 4 °.

4.2.2 illumination conditions

When the samples were evaluated illumination conditions observation area shall be (1000 ± 200) lx.

4.2.3 Lighting viewing conditions

One of two lighting way of seeing.

4.2.3.1 0 °. 45 ° x0

Illumination beam from top to bottom is perpendicular to the sample surface, the angle between the optical axis of the illumination beam and the sample surface normal room should not exceed 10 °. Watch

Police were at the sample surface normal direction of 45 ° (error does not exceed ± 5 °) observation.

The axis of the illumination beam normal to the surface of the sample to 45 ° (error less than ± 5 °), the viewing direction and the normal of the sample surface the observer

The angle should not exceed 10 °. Arbitrary angle between the beam axis and the illumination light of the illumination beam should not exceed 5 °, sight should also be observed

Subject to the same restrictions.

4.2.4 Background and surroundings

Evaluation surrounding area should be blocked by a screen or a permanent shelter building shielded to prevent interference with stray light. Shielding screen

Colors should be neutral gray (Y10 = 30 ~ 40). The sample is placed in the background color should be neutral gray (Y10~30). Background and surrounding surface of the light

Gloss should be within the range of 5 to 10 gloss units.