Broadway Colours are the market leader for special effects in plastics.
Special Effects are achieved using a select group of pigments in place of or alongside regular pigments and dyestuffs.
Click on the boxes below to learn more about each effect.
The main metallic pigments consist of aluminium, bronze and copper powders. These are produced in a variety of particle sizes and colours to give different effects and are most commonly used in the automotive industry.
Broadway’s Frosted Effect is the only PET effect on the market to give a true frosted finish, and is particularly useful in trans colours. In opaque colours, the effect gives a slight matt finish, taking the shine off the surface. This is useful if you need to achieve a matt finish, but cannot get your tool sparked. The beauty of this effect is that it can be added to any existing PET colour you have. The effect can be supplied either coloured, or as an additive for natural bottles and to add into existing stock colours.
Pearlescent pigments are made of granules of mica coated in titanium dioxide. The mica can also be coated in other pigments to give a variety of colour effects. Differences in manufacturing can be employed to produce two and three coloured effects, thus changing the colour depending on the angle the surface of the plastic is viewed at. Like metallic pigments, pearlescents come in a number of particle sizes.
These effects involve incorporating small fibres in to the polymer. This effect can be slightly limiting, as the fibres used are not always very heat stable.
Fluorescent pigments will flouresce under an ultra-violet light and be far brighter than any organic or inorganic pigments. However, they do suffer from limited temperature and light fastness and can ‘plate out’ during moulding. This coats the barrel and screw with the pigment and makes it more difficult to clean down.
Interference Pigments fall into the same category as Pearlescent colours. As the thickness of the titanium coating is increased, interference of visible reflected light takes place. Three colours can then be seen depending on the colorants used, backgrounds and viewing angle.
Traditionally containers have been marked with printing to add information such as lot numbers sell-by-dates etc. By using an additive masterbatch the container can be marked using an industrial laser. This additive can be incorporated into other effects to allow colouring at the same time.
Luminescent pigments will glow in the dark when no light is available. Commonly used in safety signs they can also be used for packaging, toys etc.
These pigments respond to light and will change colour in natural daylight. Generally used for promotional items, toys etc.
Sparkle pigments fall in to the same category as Metallic pigments. They use coloured flecks of aluminium to give the effect. Available in a variety of particle sizes, although larger particles can cause flow problems during moulding.
These pigments change colour when the polymer is subjected to heat. The pigments can be tailor made to change from one colour to another and there is a range of colours available. They can also be engineered to change at specific temperatures.
These are multi-layered flake pigments capable of displaying colour variances. Similar to interference pearl pigments, different colours are displayed depending on the viewing angle and light source. Variochrome pigments should be used in clear polymers for the best effect.