The CELONS are a secondary seal that goes over a primary closure such as a plastic, metal cap, stopper, tin or jar making it tamper evident and counterfeit proof, ensuring the integrity of your brand. These are used in many market sectors, food drink, cosmetic and gas. The product is famous as VISKRINGS or CELONS

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  • 1892 – process discovered by Charles Frederick Cross
    1902 – Viscose development corporation founded
    1916 – Factory built in Bromley – delayed because of the 1st world war - completed in 1920
    1930 – first experiments in the manufacturing of cellulose tubing and cellulose sponges
    1948 – work begun in Swansea factory and production moved from Bromley
    1951 – Joint venture formed with American company, the Viskrings corporation of Chicago
    1969 – Viskproof capsules developed
    1973 – Viscose Development Company became the holding company and Sponcel Ltd became Viscose Group Ltd. The production of viskrings from cellulose continues
    1985 – first management buyout – bought the cellulose process from Spontex
    1985-1990 – Spontex manufactured the cellulose product on behalf of Viscose closures.
    1990 – Decision made to build own plant in Swansea, which housed the manufactuting of the company i.e. shrink sleeving and cellulose and these remain on site today.
    1998 – second management buyout
    2011 – company sold to Finance Wales and management buy in
    2016 – Viscose still manufactures the cellulose today and is regarded as one of the leading UK players in the caps, closures, seals and sleeving markets

Viskring / Celons availability

  • • Continuous Reels of flat folded tubing
    • Ready cut flat folded bands
    • Diameter Sizes 12 mm up to 119mm
    • Standard colours and specs – some available in stock.
    • Transparent, pearlized, metallic, gold, silver and stripes
    • Application over custom duty stripes
    • Transparent panels
    • Printed with a message, logo, UPC code or promotions
    • Various perforation styles Sample / Mock up service available to test the product on request.

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How do Viskrings work?

A unique product, environmentally friendly tubular bands of cellulose, contained in a preservative solution that are used as a secondary seal, to seal a product. It shrinks upto 40% of the original size and simply shrinks and dries around the product in the natural environment, making it temper proof. Easy to use, no machinery required, applied by hand, results in the perfect professional finish. Perfect solution for heat sensitive products such as perfume, whisky and any other highly flammable liquids. Apply wet and use as a secondary seal, hide fill lines, acts as tamper evidence and enhances your brand. Apply by hand, shrinks in the natural environment (up to 30% its original size), dries and results in a smooth, perfect professional finish. The product takes ONLY 60 MINUTES TO DRY

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How are Viskrings made?

Viskrings / Celons are made from extruded cellulose that originates from wood pulp derived from renewable resources. As they are made of cellulose, the seals are fully biodegradable when they are discarded. The seals are packed in plastic bags within a sealed metal or plastic container. The seals are held in the container in a mild preservative solution. Viskrings are guaranteed for 12 months unopened. Can be stored upto -10deg celsius. Opened containers needs to be resealed. Do not dilute preservative solution as this will introduce a risk of bio-degradation. Dampness should be avoided as this starts the degradation of Viskrings.

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Sizing Viskring

Sizes range from 12mm up to 119mm diameters, sizing is important as if too large viskring or celon will not provide a tight fit and may split when shrunk, too small and the viskring will be difficult to apply. 1. Measure the widest point over where the Viskring will pass 2. Add the appropriate tolerance 3. Choose the length to suit your requirement (may need to include a proportion for folding over the top of the closure. 4. Add 10% to the measured length to allow for shrinkage.


• Secure and wrinkle free seal.
• Ideal tamper evident solution.
• Stops counterfeiting acts as a sealant.
• Enhances appearance of a product.
• Gives a professional finish.
• No need to invest in heavy equipment – Hand Applied
• Shrinks easily around awkward shapes.
• Can be applied around plastic, metal, glass.
• Environmentally friendly.
• Bio-degradable.
• Prevents evaporation.
• Eliminates dust, dirt & dampness.
• Perfect for heat sensitive products.



    India’s pharmaceutical industry is growing globally and need high quality packaging support too. Packaging Connections helps pharmaceutical packaging companies to do business in India using our vast one to one direct packaging network. Viskrings / Celons is a unique product which can fill in the demands of many pharmaceutical companies and our partnership will be able to fill the gap between locally available material, adding value to the business. So we support their activities in India locally. We are the official Indian partners for Viskrings to establish their business in India.


  • Business Opportunity Identification

    We have proven studies at Viskrings products and capabilities. We also listen to customers in India and then offer the right products from Viskrings or see which new products can be developed.

    Product Trials, Recommendations, Technical Services

    Once the selection of the packaging materials is made, we coordinate the trials as well as offer the technical services locally.
  • Regulatory Support and Documentation for US FDA or EU Needs

    As India is exporting globally, we also support the companies to get the necessary documentation for the regulated markets like US, Europe etc.

    Product Selection and Development

    We help Indian pharmaceutical companies to make the right packaging selection from Viskrings and in case, its not available then we also look at the possibility of developing the new products.
  • Final Sales Order Booking and Coordination

    Once all the selection is done, we then work on the commercials like booking the order and then coordinating the delivery, forecasting, after sales service etc.,

What we do for VISKRINGS in India

  • Business Opportunity Identification with major pharma companies
  • Regional support to participate in exhibitions, events, conferences and symposia
  • Product selection and development
  • Product Trials, Recommendations, Technical Services
  • Regulatory Support and Documentation for US FDA or EU Needs
  • Final Sales Order Booking and Coordination
  • We are the exclusive partners for Viskrings in India