ISO 9689:2025 PDF

Raw optical glass — Resistance to attack by aqueous alkaline phosphate-containing detergent solutions at 50 °C — Testing and classification

Название (английский):

ISO 9689:2025

Raw optical glass — Resistance to attack by aqueous alkaline phosphate-containing detergent solutions at 50 °C — Testing and classification

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 2 сентября 2025 г.
Издание:: ISO IS 9689 edition 2 version 1
ICS:: 81.040.10

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Описание (английский):

This document specifies a method for testing the resistance of raw optical glasses to attack by aqueous alkaline phosphate-containing detergent solutions (phosphate solutions) at 50 °C and a classification of optical glasses according to the aqueous alkaline phosphate-containing detergent resistance (phosphate resistance) determined by this method. This document is applicable to samples of raw optical glasses.

Технические детали

Технический комитет: ISO/TC 172/SC 3 - Optical materials and components
SKU: ISO 9689:2025

Abstract

Overview

ISO 9689:2025 - "Raw optical glass - Resistance to attack by aqueous alkaline phosphate-containing detergent solutions at 50 °C - Testing and classification" - defines a standardized laboratory method to assess and classify the phosphate resistance of raw optical glasses. The test exposes polished glass samples to an aqueous alkaline phosphate-containing detergent solution (tripolyphosphate-based) at 50 °C, measures material loss by weight, and converts that result into a phosphate resistance classification (PR). This standard is intended for samples of raw optical glass used in optical components and production quality control.

Key topics and technical requirements

Test principle: Immerse polished glass samples in a 0.01 mol/L tripolyphosphate solution at 50 °C, determine mass loss after specified exposure times and compute the time to remove a 0.1 µm surface layer to derive the PR classification.
Test solution & chemistry: Preparation involves purified pentasodium triphosphate (tripolyphosphate) and dilution to produce a test solution with pH 10.0 ± 0.1 (at 20 °C).
Sample preparation:
- Nominal size: (30 ± 1) mm × (30 ± 1) mm × (2.5 ± 0.5) mm after polishing.
- Lapping and polishing requirements (cerium oxide

Overview

Key topics and technical requirements

Test principle: Immerse polished glass samples in a 0.01 mol/L tripolyphosphate solution at 50 °C, determine mass loss after specified exposure times and compute the time to remove a 0.1 µm surface layer to derive the PR classification.
Test solution & chemistry: Preparation involves purified pentasodium triphosphate (tripolyphosphate) and dilution to produce a test solution with pH 10.0 ± 0.1 (at 20 °C).
Sample preparation:
- Nominal size: (30 ± 1) mm × (30 ± 1) mm × (2.5 ± 0.5) mm after polishing.
- Lapping and polishing requirements (cerium oxide

ISO 9689:2025 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

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