What is BS 5666-5 - Zinc naphthenate in preservative solutions and treated timber about?  
5666-5 discusses method of analysis of wood preservatives and treated timber. The aim of BS 5666 is to provide the best industrial practice to determine the reliability of the wood preservative.
5666-5 is the fifth part of the BS 5666 series of standards that describes procedures for the
determination of zinc naphthenate, expressed as zinc, in preservative solutions and in treated timber. Two methods are described: an atomic absorption spectrophotometric method and a colorimetric method.
Who is BS 5666-5 - Zinc naphthenate in preservative solutions and treated timber for? 
5666-5 on zinc naphthenate in preservative solutions and treated timber is useful for: 
- Wooden furniture manufacturers  
- Wood preservative manufacturers
- Wooden products suppliers 
- Testing laboratories  
- Quality control personnel  
Why should you use BS 5666-5 - Zinc naphthenate in preservative solutions and treated timber?  
The preservative treatment of timber or timber products involves the introduction of stable chemicals into the cellular structure of timber that protect the timber from hazards such as wood destroying organisms. Zinc naphthenate is light in viscosity and resists oxidation. It is anti-microbial and has preservative properties.
BS 5666-5 describes a laboratory method of testing which gives a basis for the assessment of the preventive action of a wood preservative when applied as a surface treatment.  This can help to determine the microbial activity of the wood preservative that can ensure that the preservative is performing as desired.
