GB/T 22398-2008Photography -- Processing chemicals -- Specifications for potassium hydroxide (English PDF)

Foreword

This standard is identical with ISO 3625:1994 "Photography - Processing chemicals - potassium norms" (in English).

This standard is equivalent translation ISO 3625:1994.

For ease of use, this standard made the following editorial changes.

--- "This International Standard" or "ISO 3625" to "this standard";

"." --- With a decimal point instead of a comma as the decimal point, "";

--- Delete ISO 3625:1994 Foreword Introduction;

--- The Chapter 2, "Normative References" section listed in international documents equivalents translated national standards instead.

Please note that some of the content of this standard may involve patents, the issuing authority of this standard should not bear the responsibility to identify these patents.

The standard proposed by China Petroleum and Chemical Industry Association.

The photosensitive material standard by the National Standardization Technical Committee (SAC/TC102) centralized.

This standard was drafted. China Lucky Film Group Corporation Baoding Lucky Chemical Co., photography.

Drafters of this standard. Jingbo places.

GB/T 22398-2008/ISO 3625:1994 Photography - Processing chemicals - potassium hydroxide

1 Scope

This standard specifies the photographic grade chemical potassium hydroxide (danger. "C") Test Method 1) purity requirements and test purity.

1) Hazard warning symbol as defined in GB/T 20432.1-2006 in Chapter 4.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 20432.1-2006 Photographic grade chemicals - Test methods - Part 1. General (ISO 10349-1:2002, IDT) Determination of heavy metals and iron content. GB/T 20432.5-2007 Photographic grade chemicals - Test methods - Part 5 (ISO 10349-5:1992, IDT) Determination of halide content. GB/T 20432.6-2008 Photographic grade chemicals - Test methods - Part 6 (ISO 10349-6:1992, IDT) Determination of acidity or alkalinity. GB/T 20432.7-2007 Photographic grade chemicals - Test methods - Part 7 (ISO 10349-7:1992, IDT)

3 Overview

4 Requirements

Requirement in Table 1.

Table 1 Requirements

Project Test Limit Test Standard Terms Content /% >= 85.0 7.1 This standard Heavy metal content (Pb) /% <= 0.002 7.2 GB/T 20432.5-2007 Iron content (as Fe) /% <= 0.0005 7.3 GB/T 20432.5-2007 Halide content (Cl- meter) /% <= 0.3 7.4 GB/T 20432.6-2008 Carbonate content (as CO 2-3 meter) /% <= 1.3 7.5 This standard Appearance transparent solution without insolubles (except micro floc) 7.6 standard GB/T 22398-2008/ISO 3625:1994