Not all colours behave the same during application or performance on site. Generally, light colours are ideal for more applications than other colour groups.
Light colours absorb little light because the white pigments help reflect the light. This reduces the heat up effect on parts. Dark colours absorb light and hence heat far more readily, which explains why dark cars are hotter than white cars in the sun. If heat is an important element in the design or use of your product, the effects of light and dark colours are an important consideration.
Bright colours behave differently again as they not only absorb light and remit this as brightness, the pigments are more readily damaged by ultra violet light reducing the life of the colour. Bright colours that include reds, oranges, greens and blues are recommended for applications where colour retention is not critical such as playground equipment and furniture.
Dulux Powder & Industrial Coatings offers a range of over 200 stock colours in either matt, satin or gloss finish. Our standard colour range includes colours to match the earthy tones of BlueScope Steel’s Colorbond Roofing range in matt and satin. To view our standard colour range, visit: http://duluxpowders.com.au/colour/.
If you cannot find the colour you require for your powder coat from the Dulux World of Colour Powder Coat Series colour cards or this site, you can also use the Dulux World of Colour Atlas to seek a custom colour that will be made to order*.
*Please note that not all 4800 colours in the Atlas are able to be produced in Powder Coat finishes.
We recommend you call our advice team on 13 24 99
Paints and powder coatings have evolved from different industries; house paints from decorative applications and powder coatings from industrial uses. While Dulux has endeavoured to align colour names across industries, there are examples of colours e.g. Magnolia, which exist in both paints and powder coatings.
It is recommended when choosing a colour that a colour sample of each product be reviewed to ensure the colours chosen meet your needs.
Dulux can produce special colours and finishes on a Made to Order basis. Due to the nature of the manufacturing process, minimum quantity conditions limit the possibility of non-standard colours to typically large or ongoing projects. It is recommended when choosing colour, the powder coating colour be chosen first, as almost every powder coat finish can then be matched in a Dulux paint system.
Powder coatings are generally a one coat finish, applied to suitably cleaned and pre-treated substrates. Some coatings such as metallics may require a clear coat to protect the metallic effect, although these are generally being replaced with the Dulux Precious® and Electro® Powder Coat Ranges which do not require a clear coat.
Powder coatings are a factory applied finish using specialised equipment. The equipment includes an electrostatic spray gun, spray booth and an oven to bake (or cure) the coating. On site application is not possible given the hot curing cycle required to fuse the coating.
Whilst powder coatings generally require no primers, it is important to provide a clean and pre-treated surface for the powder coat to adhere to. Metals that are planned for internal locations can escape the need for pre-treatment.
Unfortunately there is a myth that since powder coating is easier to apply than wet paints and retains a very hard finish, that powder coatings can withstand anything and everything. Indeed this carefree view has led to some disappointing applications of powder coatings. Powder coatings rely on a clean, pre-treated surface like any and every other coating.
Rusty metal deposits must be removed prior to powder coating, as over coating with powder will only mask what is fundamentally corroding metal. Powder coatings provide very good resistance to knocks and abrasions, chemicals and the effects of sun. However, if not cared for, the coating can show up scratches and film integrity loss.
Some powder coatings can be designed specifically for contact with food but this is a specialised application that could be developed on a Made To Order basis. If this feature is required, you should contact Dulux for further information as the standard ranges of powder coatings are not suitable for contact with food.
Some powder coatings can be specifically designed for electrical properties, but again, as with food grade coatings, this is specialised and you should contact Dulux for further advice.
Whilst powder coatings have the advantage over solvent based coatings of having a lower explosion point and therefore less flammable, caution should always be exercised with any electrical source such as mobile phones. Powder coatings are a fine organic dust which in high concentration, in the presence of air and an ignition source such as a mobile phone, could trigger a dust explosion.
The concentration of dust required to facilitate a dust explosion is significant, however, it is advisable to keep unnecessary equipment away from the booth and powder. As a precaution, Dulux recommends that mobile phones should be kept clear of these areas.
Powder coatings are produced by dry blending resins, pigments, additives and curing agents which are then extruded at elevated temperatures to melt and mix the ingredients. The material then becomes thick and viscous like a honey mixture which is cooled using super chilled water, before the material is crushed progressively to a fine, well defined particle size. Specialised equipment including rotary sieves and particle size measuring equipment is used to monitor and control the particle size distribution.
Dulux has two production facilities for powder coatings supplied to the local market. Our facility in Dandenong South, Victoria has four production lines with the capability of handling small batch sizes. The second facility is located in Auckland, New Zealand, which also has a variety of small and large equipment to cater for the extensive range of products manufactured by Dulux.