GB/T 23983-2009Test method for yellowing resistance of wood coatings (English PDF)

1 Scope

This standard specifies the test methods for aging equipment UV fluorescence of single or multi-layer coating film coatings were yellowing resistance measurement.

This standard applies to all types of wood coatings yellowing resistance measurement.

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 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528.2000, IDT)

GB/T 9271 Paints and varnishes - Standard panels for (GB/T 9271-2008, ISO 1514.2004, MOD)

GB/T 9278 paint sample conditioning and testing temperature and humidity (GB/T 9278-2008, ISO 3270. 1984, Paintsand varnishesandtheirrawmaterials-Temperaturesandhumiditiesforconditioningandtesting, IDT)

GB/T 23987 Paints and varnish coating artificial climate aging exposure exposed to fluorescent UV and water (GB/T 23987-

2009, ISO 11507.2007, IDT)

Principle 3

Using fluorescent UV coating equipment for artificial weathering test, its purpose is to produce agreed by the device radiation exposure or energy supplier

Given exposure time, so that one or a few properties of the coating to achieve a given degree of change. Usually after exposure to the performance of their coating

Unexposed coating (comparison sample) performance compared to or simultaneously with the exposure of aging properties known coating (reference sample) performance compared with there

Interested parties pre-agreed indicators to assess these properties.

Compared with natural aging, artificial weathering simulated only a limited number of factors that influence the aging process, and by strengthening control and to increase

Accelerated aging. The impact of the aging process for many reasons, an exact simulation of natural climate effects of coating all the factors are not

Possible, so simple with the results of artificial weathering to predict the result of exposure under natural conditions is not desirable.

4 Equipment

5 Sampling

According to GB/T 3186 provisions to take the test product (or coating system for each product) of a representative sample.

6 test plates