• What is GC Halo®

  GC Halo® is our patent-pending graphene oxide/silver nanoparticle formulation that forms an antimicrobial layer on fabrics.

• How does it work?

  GC Halo® works with a dual action, “trap-and-neutralize” nano-chemistry where graphene oxide and silver nanoparticles work together.

  The negatively-charged surface of the graphene oxide traps water droplets and the protein spikes on coronavirus; the silver nanoparticles neutralize coronavirus by oxidizing the membrane that protects the RNA inside.

  All this happens on the nano-scale – which makes it more effective. If you’d like the detailed scientific version of this, you can look at the Brown University report.

• Is it effective?

  Yes, tests by Brown University have shown that GC Halo® in liquid form is 100% effective against Human Coronavirus OC43 and Influenza A H1N1 viruses – in less than one minute.

  Also, independent UK ISO tests on GC Halo® treated fabric to determine antiviral activity on textiles have been certified to show at least 99% effectiveness against SARS-CoV-2 – tested according to ISO 18184:2019. Independent testing at Innovative Bioanalysis shows 77% reduction in Airborne SARS-CoV-2 in a single pass, increasing with additional passes.

  Additionally, GC Halo® coated air filters proven to be 99.99% efficacy against mould (aspergillus brasiliensis) and bacteria (Escherichia coli, Staphylococcus aureus).

• Is it safe?

  Yes, an independent study by the UK Centre for Process Innovation (CPI) confirms no shedding of GC Ink® particles in airflow tests of GC Halo® treated filter materials – addressing toxicity concerns. The CPI study used over 20,000 sampling data points to measure particle shedding of GC Ink® and found none.

  We are preparing for the US Environmental Protection Agency (EPA) approval process, as well as the EU’s Biocidal Products Regulation (BPR) approval process, covering both effectiveness and safety, and we are obtaining International Standards Office (ISO) certifications for product applications.

• Why did you develop GC Halo®?

  We developed the ink in response to the Covid-19 pandemic. Before the pandemic hit, we were working on a joint project with Brown University to develop a graphene oxide formulation to coat on clothing that would protect against mosquito bites – we significantly adapted and extended this formulation to protect against Coronavirus.

• Where can GC Halo® be used?

  GC Halo® can be used as a surface treatment; it can be sprayed, dip-coated or otherwise applied onto filter materials where it can trap and neutralise airborne viruses and/or bacteria, or onto surfaces where it can leave a virucidal/germicidal layer of protection.

  For manufacturing partners, we can supply trial production batches – provided that we agree on NDAs and Heads of Terms with you beforehand.

• How has GC Halo® been tested?

  GC Halo® has been tested with the following independent testing labs:

  • Virucidal efficacy on Human Coronavirus OC43 and Influenza A H1N1 viruses by Brown University, USA
  • Antiviral activity on textiles according to ISO 18184:2019 by Virology Research Services (UK)
  • GC Halo® coated air filters proven to be 99.99% efficacy against mould by SGS
  • GC Halo® coated air filter reduced viable airborne SARS-CoV-2 by 77% in a single pass in a ventilation duct airflow
    by Innovative Bioanalysis, US
  • Shedding of GC Ink® particles in ventilation airflows by the UK Centre for Process Innovation (CPI)
  • Pressure drop tests to measure the effect of GC Ink® on filter materials in ventilation system
• Does GC Halo® kill the coronavirus?

  Strictly speaking, coronaviruses are not considered to be living organisms, so GC Halo® can’t kill something that isn’t technically alive. However, GC halo® is considered to be virucidal in that it has been shown to neutralise the ability of coronavirus to replicate.

• What kind of microbes does GC Halo® kill?

  GC Halo® kills many kinds of harmful microbes including viruses, bacteria and mould.

• When will it be ready?

  GC Halo® is ready for product applications in filters and wipes with relevant ISO 18184 certification and samples can be provided with relevant NDAs in place.

• Is it recyclable?

  GC Halo® can be used in recyclable materials such as cotton or viscose-based fabrics.

• What is its carbon footprint?

  The processes used to produce GC Halo® – for example, mixing the key ingredients, spraying or dip-coating onto filters – consume relatively low amounts of energy and thus have a relatively low carbon footprint.

• I'm a manufacturer, how can I buy it?

  We would work with you to apply our GC Halo® to your product – so we would supply GC Halo® to your facilities to be incorporated into your manufacturing process.

  We can supply samples provided that we agree on NDAs and Heads of Terms with you beforehand and provide large-scale production.

  Sample product applications are on face masks and other PPE, filters for ventilation systems, wipes and other healthcare/sanitation products, and many consumer goods, like phones/toys etc.

• I'm a retail customer, how can I buy it?

  We do not sell GC Halo® directly to consumers; instead look out for the “GC Halo®” trademark and/or the GC logo on whatever product that you’re looking for (like filters, etc).

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