Chloe Zhang
When choosing glitter for soft plastics, it is important to consider the environmental impact of microplastics and opt for sustainable alternatives. Conventional glitter is made from polyester, a type of plastic commonly found in sewage sludge and wastewater, which can affect the reproduction of soil organisms and harm soil health. To address this issue, researchers from the University of Melbourne and the University of Cambridge have developed a biodegradable glitter made from cellulose, a component that gives tree wood its strength. This cellulose glitter is environmentally friendly, sparkly, and non-toxic to aquatic life, making it a safer alternative to traditional glitter. When selecting glitter for soft plastics, it is recommended to avoid craft store glitter and choose non-metallic, super-fine glitter specifically designed for injection molding fishing lures.
Characteristics of glitter for soft plastics:
| Characteristics | Values |
|---|---|
| Type | Non-metallic, non-craft store glitter |
| Heat rating | Able to withstand high temperatures |
| Material | Plastic, cellulose, calcium aluminum borosilicate, synthetic mica, bismuth oxychloride, copolymer plastics, aluminum foil, polyethylene terephthalate, polyurethane, nylon, titanium dioxide |
| Size | Super fine |
| Colour | Fire opal |
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What You'll Learn
Non-metallic glitter is best for soft plastics
When it comes to choosing glitter for soft plastics, it's important to select the right type that is compatible with the plastic and does not pose any environmental concerns. Non-metallic glitter is the recommended option for several reasons.
Firstly, non-metallic glitter is generally safe to use with soft plastics. Metallic glitter often contains metal flakes or particles that can interfere with the plastic's properties, causing issues during the manufacturing process or affecting the final product's durability. Non-metallic glitter, on the other hand, does not pose these risks and is therefore a more reliable choice.
Secondly, non-metallic glitter offers a wider range of colours and finishes. It is available in various colours, including vibrant and iridescent options that can enhance the appearance of soft plastics. Non-metallic glitter can also be specially manufactured to be compatible with specific types of plastics, ensuring that the colouring remains stable and does not bleed or fade over time.
Another advantage of non-metallic glitter is its environmental friendliness. Traditional glitter is often made from plastic, contributing to microplastic pollution when it washes down the drain. Non-metallic glitter, however, can be made from sustainable materials such as cellulose, which is biodegradable and does not harm soil health or aquatic life. This makes it a more eco-friendly option, especially when used in products that may eventually end up in waterways.
Additionally, non-metallic glitter is a versatile choice. It can be added to soft plastics during the manufacturing process or applied as a coating or finish. This flexibility allows manufacturers and crafters to create unique and customised products, expanding the possibilities for creative applications.
Finally, non-metallic glitter is a cost-effective option. It is widely available from various suppliers, including companies that specialise in components for plastic injection moulding and fishing lures. This accessibility ensures that those working with soft plastics can source the right type of glitter without incurring excessive costs or wasting materials through trial and error.
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Fire opal glitter is an option, but it can disappear in plastic
Fire Opal glitter is a type of glitter that can be used to decorate soft plastics. It is a synthetic opal that is created by combining plastic with silica. This process results in a unique columnar structure that resembles the growth pattern of natural opal, with its distinctive play of colours. The vertical fire pattern is a key feature that distinguishes lab-grown opals from their natural counterparts. However, when using Fire Opal glitter in soft plastics, it is important to note that it may not be as visible as desired.
The visibility of glitter in soft plastics depends on various factors, including the type of glitter used, its particle size, and the colour and opacity of the plastic. Fire Opal glitter, with its iridescent and multicoloured properties, can sometimes get lost within the plastic matrix, especially if the plastic is opaque or has a dark colour. To ensure optimal visibility, it is recommended to use a lighter-coloured or transparent plastic as the base. Additionally, choosing a larger particle size for the glitter can also enhance its visibility.
One way to enhance the visibility of Fire Opal glitter in soft plastics is to use a contrasting base colour. For example, if the Fire Opal glitter has predominantly warm tones, such as orange and yellow, using a cool-toned blue or purple plastic can create a striking visual effect and make the glitter stand out. Similarly, a darker-coloured glitter, such as a deep emerald green, would pop against a lighter-coloured plastic, such as a pale pink or yellow.
Another technique to ensure the Fire Opal glitter doesn't disappear in the plastic is to use a higher concentration or density of glitter within the mix. By increasing the amount of glitter relative to the plastic, you can create a denser concentration of sparkly particles, making them more visible to the eye. However, it is important to strike a balance, as too much glitter can affect the structural integrity of the plastic and may result in a brittle or uneven finish.
While Fire Opal glitter can be a beautiful option for soft plastics, it is always recommended to experiment with different types of glitter to achieve the desired effect. Conventional glitter, such as polyester or PET glitter, is widely available and can provide a more consistent result. Additionally, sustainable alternatives, such as plant-based or cellulose glitter, offer an environmentally friendly option without compromising on sparkle. These alternatives are worth considering, especially if the impact of microplastics on the environment is a concern.
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Some craft store glitter can melt at low temperatures
When it comes to glitter, it's important to consider its potential impact on the environment. Conventional glitter is made from microplastics, which can be harmful to aquatic organisms and the environment. These microplastics can be found in sewage sludge and wastewater, contributing to water contamination.
To address this issue, researchers from the University of Melbourne have developed a new type of glitter made from plant cellulose. This biodegradable glitter is environmentally friendly and does not impact soil health or the reproduction of soil critters like springtails, which are important for organic matter breakdown and nutrient release for plants.
While biodegradable glitter is commercially available, some craft store glitter options may not be truly biodegradable. Some "biodegradable" glitters on the market are coated in a coloured aluminium layer and topped with a thin plastic layer, which can still be harmful to the environment.
Therefore, it's important to choose biodegradable glitter carefully and consider alternatives like the cellulose-based glitter developed by the University of Melbourne. By making informed choices, we can reduce the environmental impact of glitter and contribute to a healthier ecosystem.
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Biodegradable glitter is coated in coloured aluminium and a thin plastic layer
Biodegradable glitter is an eco-friendly alternative to traditional glitter, which is made from microplastics that persist in the environment for years. Biodegradable glitter is crafted using materials that break down naturally over time. It typically utilizes plant-based regenerated cellulose or modified regenerated cellulose (MRC) sourced mainly from Eucalyptus trees as their core.
However, to make it reflective and colourful, this core is then coated with coloured aluminium and a thin plastic layer (e.g. styrene acrylate or epoxy resins). This is why biodegradable glitter is not 100% plastic-free. According to manufacturers, it decomposes into non-toxic substances, minimizing the risk of environmental pollution and harm to wildlife.
The need for biodegradable glitter has become increasingly important due to global concerns about plastic pollution. Traditional glitter is made from a combination of aluminium and plastic. Its size is considered microplastic, which finds its way into aquatic habitats, eventually becoming ingested by wildlife and, ultimately, by humans.
In a bid to reduce plastic pollution, the European Union officially banned the sale of loose plastic glitter and some other products that contain microbeads in October 2023. This has led to a rapidly growing market for alternative glitters, with many new brands entering the marketplace.
While it is positive that biodegradable glitter was not found to be directly harmful to soil critters, it is concerning that traditional glitter affected their ability to reproduce. This could lead to bigger problems for soil health, such as less organic matter breaking down and fewer nutrients being released for plants.
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Polyester glitter is not permitted by the FDA for cosmetics
The use of polyester glitter in cosmetics is not permitted by the FDA. Polyester glitter is a familiar plastic style glitter that is commonly found in various cosmetics, including those sold in the USA. Despite its prevalence, the FDA has stated that polyester glitter is a new kind of composite pigment that falls under the same regulations as all other colour additives. As such, it requires approval from the FDA before it can be used in cosmetic products.
The FDA's position on polyester glitter has created a grey area in the cosmetics industry. While the FDA does not explicitly call out cosmetic-grade PET microfine glitter as unsafe, it maintains that glitter is a colour additive that is not on its approved list. This discrepancy has led to confusion among consumers, who see glitter in cosmetics readily available on the market. The FDA has acknowledged this discrepancy and has provided a grace period during which enforcement of the regulations will be discretionary.
During this grace period, the FDA will allow products containing non-permitted colour additives, like glitter, to enter the US market while they continue to review data through the petition process. However, the length of this grace period is uncertain, and it could be revoked at any time. In the meantime, consumers are advised to exercise caution when using cosmetic products containing polyester glitter, especially near the eyes, as larger glitter particles can pose a risk of eye injury.
As an alternative to polyester glitter, the FDA suggests using other permitted "glittery" ingredients, such as calcium aluminium borosilicate, synthetic micas of large particle size, or bismuth oxychloride glitter. These ingredients can provide a similar sparkly effect without violating FDA regulations. Additionally, sustainable alternatives to plastic glitter, such as plant-based or cellulose glitter, are being developed and may offer a safer and more environmentally friendly option for consumers.
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Frequently asked questions
You can use any type of non-metallic glitter for soft plastics.
You can buy glitter from companies that sell it for injection moulding fishing lures.
A sustainable alternative to plastic glitter is plant-based glitter made from cellulose.
Glitter from craft stores may not work for soft plastics as it is meant to be sprinkled on top of something and not injected into hot plastic.
Polyester glitter is a type of plastic glitter commonly found in cosmetics. While the FDA does not permit its use in cosmetics, it is still present in many products.
