We live in a colourful world. While mother nature herself has painted our world in strokes of brilliant colours, we human beings have also done our best to continue this legacy with our clothes and possessions.
But the object most synonymous with colours is plastic, especially the kind of plastic we use for crockery, cutlery and toys. But have you ever wondered where these colours come from?
The answers lie in pigments. These are the tools that make the world colourful around us in many ways.
If you are looking for pigments, you will need a reliable pigment supplier, including pigment violet exporters . A good supplier can only enhance your product.
So, take this decision carefully and evaluate all factors before selecting the right candidate.
Use of colours in plastic
One of the most significant advantages of plastic over materials like wood or metal, is its in-built colour. Unlike other materials, plastic parts are moulded with the colourants injected. This gives it certain advantages, such as:
- It removes the need to colour parts during the manufacturing process, lowering the costs.
- When working with minimal parts, this becomes a distinct advantage because of the effort and cost saved.
- Unlike wood or metal, the colour cannot peel off since it is an intrinsic part of the product. This lowers maintenance costs and improves durability.
The presence of colour as a component has given the plastic industry the ability to evolve into more advanced polymers. Such colourants take on a whole new advantage, such as a component in cable or FRP gratings.
In materials like wood and metal, colours are also used as a corrosion-resistant layer. Plastics, however, do not have those limitations. They are resistant in their very composition.
Choosing the right colour
The injection of dying of colour in plastic parts has many purposes. Its use is not just to be attractive. There are other considerations, such as meeting safety standards or industry norms.
For instance, a bright red plastic cone is a safety feature in road safety gear. Similarly, the electronic industry has colour-coded components for various functions.
The intensity of the colour can also play a rule here, although not as much as it happens in products like a toy.
The safety cone, for instance, must be bright. Similarly, a customer is more likely to choose more vibrant products, even if colour coding is somewhat uniform for all products.
All this means is that we have to pay particular attention to the colour palette. Most colour injections have a total shade concentration of 0.2% for organic colours.
However, in the case of working with pigment violet exporters, use 0.1% pigment. In the case of organic dyes, we use 2% pigment.
What happens when two chemical entities are brought in contact with each other? If the two are unstable, we will react. In the case of pigments and plastics, this property is used when moulding the plastic.
But we also have to consider how the dye will affect the overall quality or composition of the plastic. Once we have a final product, the two achieve a dormant state within the whole.
However, heat can again change the character. This is why a pigment’s reaction to heat and its subsequent reaction with the plastic becomes critical.
The critical parameters to consider are heat resistance, hot light fastness, weather resistance and warping.
Organic or inorganic
Organic pigments have the advantage of carrying almost no harmful chemicals. The colours also come in a broad spectrum. With concerns over the detrimental effect of inorganic pigments, we see increasing adoption of organic alternatives.
However, the disadvantage here is the organic pigment’s low efficiency, resistivity to heat and weathering. While these are preferred in products like toys and dinnerware, inorganic pigments are more suited to the polymer industry in cabling and construction.
Sticking to one supplier
Ultimately, we must stick to one supplier. Despite industry standards, the same colour palette can differ from one pigment violet exporters to another. Frequently changing the supplier can affect batch consistency and even manufacturing processes.
This is why colour palettes must be worked out carefully with test batches to ascertain quality. A long-term supplier is desirable in ensuring both quality and economy.