Colour Anodising is recognised as one of the UK's leading metal finishing companies


Our aims & values


+ Approved to ISO 9001:2008

+ Latest digital testing equipment including micron thickness, weight loss and admittance

+ Comprehensive process control

+ Full time solution analysis


+ Approved to ISO 14001

+ Winner of Groundwork Trust Award for waste effluent and water recycling

+ State of the Art water recycling/effluent plant

+ Continual monitoring of plant environmental impact


+ Advice on alloy section colours and finishes

+ Quotes in writing - typically the same day

+ Site visit if required - help us understand your requirements

+ Free sample colour swatch available. Call to request


+ Direct contact with senior staff

+ Delivery time to suit customer wherever possible

+ 4 process plants offer a full range of finishes and colours

+ Delivery by our vans or national carrier

Our success, to a large extent, is due to the dedication, quality and experience of our staff

Colour Anodising


Colour Anodising's aim is always to exceed our customers' expectations

Colour Anodising


what we do



Every project is different and that means the approach must be as well.

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aqua blast

We build a team around your needs and provide our clients with direct access to everyone.

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Sulphuric Anodising

Sulphuric Anodising is an electrochemical process that converts the aluminium surface into a decorative, durable, corrosion-resistant, anodic oxide finish



  • Satin Silver, Black, Bronze & Gold up to 6000mm
  • Bright Silver, Gold, Black up to 2400mm
  • A large range of colours in Bright, Bright Etch and Satin finishes.

The anodic oxide structure originates from the aluminium substrate and is composed entirely of aluminium oxide. This aluminium oxide is not applied to the surface like paint or plating, but is fully integrated with the underlying aluminium substrate, so it cannot chip or peel. It has a highly ordered, porous structure that allows for secondary processes such as colouring and sealing.

How is it done?

Anodising is accomplished by immersing the aluminium into an acid electrolyte solution and passing a current through the aluminium. A cathode is mounted to the inside of the anodising tank; the aluminium acts as an anode, so that oxygen ions are released from the electrolyte to combine with the aluminium atoms at the surface of the part being anodised. Anodising is, therefore, a matter of highly controlled oxidation - the enhancement of a naturally occurring phenomenon.

Colour Swatch

To see the range of standard colours we offer we have designed the colour swatchbook shown below. Click on the cover to see the range of colours. To see an individual colour click on the relevant blade which will reveal the colour name. Please call or email to order your free aluminium colour sampler which physically represents the colour swatchbook shown below.








Green 3

Green 2

Apple Green

Blue 3

Blue 2





Lime Green


Colour Swatch

Click to open/close

For technical reasons connected with colour reproduction and media limitations, the colours shown may not be exact representations of the finished products.


Hard Anodising

Hard Anodising is the term used to describe the production of anodic coatings with film thickness, corrosion and abrasion resistance as their primary characteristics.


The nominal thickness of coatings applied is 25-50 microns but a controlled thickness can be obtained from just a few microns up to 100 microns depending on the alloy chosen.


The wear characteristics of hard anodised aluminium are most favourable at low loads and compare most favourably with hard chromium and high speed steel, in most cases better.

The micro hardness of the coating varies significantly depending on the alloy chosen.

Generally the high strength alloys i.e. 2000 and 7000 alloys produce a micro hardness figure ranging from 250 to 350 micro Vickers and 6000 alloy range 400-500 micro Vickers.

A note of caution should be made when comparing micro hardness to wear resistance, the hardness measured by micron-indentation method does not represent the performance of the material.

It has been found that a hard anodised coating measuring 450mv will have a wear resistance of tool steel of 950 mv and even an anodic coating of highcopper alloy such as 2014 measuring 250-280 mv will often offer as much wear resistant as tool steels.


Hard anodic coatings have better abrasion resistance than conventional coatings of the same thickness. Corrosion resistance is further improved by sealing but with some loss in the abrasion resistance (about 20%).


Depending on alloy chosen and film thickness the colour varies from light grey to dark grey.


Due to the fact that the hard anodic film is an integral part of the aluminium, you will find that the adhesion properties are superior to that of any other coating applied to aluminium

Fatigue Strength

Hard anodising will reduce fatigue strength considerably - up to 47%

Heat Resistance

Hard anodic coatings can withstand short exposures up to 2000°C. Long exposure to high temperature shows no adverse effect on performance, other than surface crazing


Aqua Blasting

Colour Anodising has responded to the market demand for a high quality Aqua Blast finish.

We now have a state-of-the-art Aqua Blasting facility which utilises the latest technology. Advanced process control measures allow us to maintain excellent consistency.

The key to aqua blasting is that the finish is produced through the flow of water borne abrasive, giving a finer finish due to the flushing action of the water. No media is impregnated into the component, nor is there any dust created by the break-up of media, unlike dry blasting where the finish is produced by sheer force of media impact.

Aqua blasting provides the perfect pre-anodising finish to aluminium.


The illustrations below show the different natures of conventional grit and bead blasting compared to Aqua Blasting

Bead blasting demonstrates the aggressive abrasion caused by the severe 90° ricochet of the material fired

Dry grit blasting also exhibits severe and uneven pitting, caused again by the 90° ricochet of the inconsistent material

Aqua Blasting is a gentler method where the media angle is reduced by the cushioning effect of water to produce a lapping effect travelling across the surface, giving an even satin/polished finish

what we do


Quality is about meeting the needs and expectations of customers.

Our aims are to:

  • Achieve and improve customer satisfaction;
  • Improve and innovate working methods;
  • Increase efficiency and reduce waste and cost;
  • Identify and manage risk to the business and
  • Ensure corporate care and responsibility

Wrought Alloy

Cast Alloy

Colour Fastness


BSI Quality

BSI Environment

Employee Privacy



what we do


meet the team

Colour Anodising Ltd. recognises its obligation to comply with the law and carry out its business in as environmentally sound a manner as possible.

We are committed to ensure that the impact of our operation on the environment is reduced to as low a level as is practically and economically feasible

Colour Anodising

we would love to hear from you



Holland Street

Greater Manchester, M26 2RH


TEL +44(0) 161 723 2637

FAX +44(0) 161 725 9252