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Protective Coatings for Brass, Copper, Zinc and Decorative Metals Print E-mail


Indestructible

For high quality, high performance products of Brass and other decorative metals, the range has been developed and upgraded from traditional formulations manufactured by Llewellyn Ryland, and brought into the Indestructible portfolio in 1996. Extensive development has seen the range expanded and improved, taking into account new raw materials and practices and the changing requirements of the Environmental Protection Act and the need to reduce the use and emission of Volatile Organic compounds.

Image of Coatings for Brass, Cu, ZnOur products are widely used to enhance and protect light fittings and switch plates, coffin fittings, beer fonts, carriage clocks, architectural door furniture, beds, bathroom fittings, marine railings as a taster.

Taking into account the need for different application and drying methods, and different performance criteria, the family includes both air drying and stoving products and introduces modern radiation curing systems to this marketplace.

Air Drying Systems
Two products types are available: 30000 range of N/C lacquers and finishes which give rapid drying; excellent clarity and smoothness but with limited technical performance. 40005 Incralac is based on technology used by the ministry of defence to coat ammunition casings. The product therefore gives excellent hardness and durability but can exhibit fine orange peel on large smooth surfaces.

Stoving Systems
A wider range of products to encompass modified epoxy; full epoxy; acrylic and water based.

The modified epoxy has the benefit of rapid dust free surface drying which allows easy handling and the prevention of air borne inclusions in the applied film. This makes it ideal for use on highly decorative items.

Full epoxy products give excellent hardness and chemical resistance but require longer curing schedules than the modified products. These products are widely used on both external and internal items where the premium durability is a requirement.

Acrylic stoving systems increase the external weathering properties of the epoxies but will exhibit reduced chemical resistance. They do offer better resistance to heat making them ideal for use on fire surrounds and grates.

Water Based Systems
Recent development of water based stoving lacquers has produced a range which will give the performance typical of epoxies but with benefits to the environment from reduced solvent emissions. However greater control of the working area is required and attention has to be paid to using water vapour compatible spray booths and ovens.

Radiation Curing
Much work has been conducted with the use of UV light curable products in the wood and plastics coating industries. This type of coating system gives high quality finishes with curing taking only seconds and applying very high solids products with minimal solvent content. The environmental benefits of these are of great interest. However it is difficult to apply thin coatings which will limit their interest to some of the brass coating industries.

Special Effects
Whilst most of the products used to coat brass are clear gloss lacquers; used to retain “that just polished look”, a full range of special effect products are available in most grades to give antique effect; colours and tints and varying gloss levels.
 
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