Viskrings / Celons

Viscose Closures Ltd is the only producer of cellulose closures in the world and Viskrings, known as Celons in the US, have been providing tamper-evident protection around the world for generations

Uses

Viskrings are used to provide a tamper-evident and counterfeit-proof secondary seal over a primary closure such as a cap or stopper. Other uses include sealing the valves of gas cylinders and acting as a label and tamper evident seal combined.

What they are made of

Viskrings are made from regenerated cellulose derived from the wood-pulp of fast-growing softwood trees and bio-degrade even faster than paper when discarded. Viskrings are stored in a preservative solution and supplied in sealed tins or pails.

Choices

Viskrings can be supplied transparent or in a wide range of colours including metallic such as silver and gold.
Printed Viskrings are available with a maximum of two colours printed on either side
Perforations can be added to assist with the removal of the Viskring from the container

How they work

Viskrings are applied by hand. Almost as soon as Viskrings are removed from the preservative solution they begin to dry out. As Viskrings dry, they shrink up to 30% in the transverse direction and up to 10% in the vertical direction. Shrinking time depends upon ambient conditions but normally they begin to shrink after about 5 minutes and the whole shrinking process can take up to an hour. Shrinking can be speeded up by applying heat. Viskrings shrink to form profile-hugging seals which continue to apply pressure to the closure even when shrinking has been completed.

Sizing Viskrings

Viskrings are available in diameters from 12mm up to 119mm. Sizing is important because too large a Viskring will not provide a tight fit and may split when fully shrunk, whilst too small a Viskring will be difficult to apply.

Measure the widest point over which the Viskring/Celon must pass, then add the appropriate tolerance. Choose the length ito suit your requirements which may need to include a proportion for folding over the top of the closure. Add 10% to the measured length to allow for shrinkage.

Alternatively you can always send us a sample of your container and we will advise you of the size of Viskring you require.

Ordering on line

For smaller orders in a standard range of colours and sizes, an on-line ordering and payment facility is available from us through www.ecapsdirect.com

Just click on the link and place your order.

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