ISO/TS 18950:2021 PDF
Imaging materials —Photographic prints — Effect of light sources on degradation under museum conditions
Imaging materials —Photographic prints — Effect of light sources on degradation under museum conditions
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 16
- Дата публикации:
- 8 ноября 2021 г.
- Издание:
- ISO TS 18950 edition 1 version 1
- ICS:
- 37.040.20
The test method in this document is intended to be used to characterize and compare the degradation of a set of print materials under exposure to particular light sources, eventually including optical filter combinations, under museum environmental conditions. The document covers typical types of indoor light sources commonly found in a museum including indoor daylight, LED, and incandescent light. This document is applicable to analogue and digital reflection photographic prints. NOTE Examples of photographic prints covered by this document are prints made with digital printing technologies such as inkjet, electrophotography, and thermal dye transfer, as well as prints made on silver halide colour paper but not prints made on black and white silver halide paper.
Abstract
Overview
ISO/TS 18950:2021 - Imaging materials - Photographic prints - Effect of light sources on degradation under museum conditions - specifies a test method to characterize and compare light-induced degradation of photographic reflection prints displayed in museums. The technical specification applies to analogue and digital colour prints (inkjet, electrophotography, thermal dye transfer, silver‑halide colour paper) but excludes black‑and‑white silver‑halide paper. It addresses typical indoor museum light sources (indoor daylight, LED, incandescent) and the use of optical filters to simulate real display conditions.
Key topics and requirements
- Scope and use profile: Designed for prints displayed framed or unframed, continuously or intermittently, under controlled museum environmental conditions.
- Spectral characterization: Uses relative spectral irradiance (RSI) across 300–800 nm to describe light sources - important for non‑Planckian sources such as LEDs.
- Exposure units and limits: Introduces exposure metrics like Mlx‑h (mega lux hour) and concepts such as limiting exposure and safe display duration for accumulative light exposure.
- Controlled stress factors: Specifies acceptable museum ranges for non‑light stresses - temperature (typical day/night 18 °C–24 °C), relative humidity (30 %–55 %), low ozone (
Технические детали
- Технический комитет
- ISO/TC 42 - Photography
- SKU
- ISO/TS 18950:2021
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