Why the diameter of corks is a key determinant of price

cork stoppers

It can often be the case that small increase in the diameter of a cork stopper can dramatically increase the price – this is particularly the case for natural cork, but is also an issue for agglomerated cork and this is why. For natural corks, diameter is the most crucial parameter because of how the corks are made: to make … Read More

Different qualities of natural cork


There is a large range of different qualities of natural cork available – here we will discuss only natural cork (so not agglomerated or natural cork) and will focus on cork stoppers rather than other items made from cork. Cork stopper quality starts with the quality of the bark – to make high quality cork stoppers you need bark that … Read More

Expanded cork for acoustic and thermal insulation of flooring


Expanded cork is one of the most environmentally forms of insulation and can be used to insulate walls, roofs and flooring. Here we are going to look at how expanded cork (also known as Insulation Cork Board, or ICB)is generally applied for flooring applications using a concrete slab and screed. As well as providing thermal insulation of λ = 0.037 … Read More

Cork bases for candles


We supply a number of clients all over the world with cork lids for glass and ceramic candle holders (both conical and lipped cork lids). We also make cork bases to hold candles and you can seem some of the different options that are available for items made of cork which are applicable to other items as well as cork. … Read More

Cork supply during the pandemic

Our approach to working with the coronavirus pandemic is that we will do what we can to keep our cork production open and we do not envisage having any shutdowns unless it is mandated by the Portuguese Government. All the stages of cork production, be it for cork stoppers, cork lids, expanded cork or whatever involve workers at individual work … Read More

Densities of cork granules


When ordering natural cork granules (as opposed to expanded cork granules), density is the most important factor that you will have to consider. Cork granule density can vary between 60 kg/m3 and 220 kg/m3 and the properties and appearance of the granules along this spectrum will vary enormously. In this article we will look at what density of cork granules … Read More

Producing oversized bar-top corks


Over the last few years there has been an abundance of new spirits brands launched on to a thirsty public, looking for something new and different to drown their sorrows with. As a result here at CorkLink we receive an increasing number of unusual requests for bar-top corks from brand owners looking to make their brand stand out from the … Read More

Cork – all about quality


There is a tremendous variety in the quality of the cork that is harvested from the cork oak trees and sorting these different qualities of cork is a key part of the cork industry. Natural cork stoppers are made by taking a strip of cork bark and literally punching out a cork and to make a high quality cork it … Read More

How cork products are made – from tree bark to stopper

cork production

There are a lot of misunderstandings around about where corks come from and how cork products are made, so this article will aim to simplify the process to explain how natural cork and agglomerated cork products are made. Here you can see a diagram which shows the various processes and cork products that are produced. For the sake of simplicty … Read More

Which density of expanded cork should you use?


Expanded cork is made in an autoclave, which is essentially a press where cork granules are added and placed under pressure and super-heated to make a block. The granules stick together because under the heat, the resin that is contained within the granules is released to form a natural kind of glue to bind all the granules together. Under this … Read More

The cork industry – where nothing gets wasted

Cork itself is one of the most environmentally friendly materials on the planet – it is made by removing the bark from the cork oak tree, which does not kill the tree, but rather the bark regenerates to be removed time and time again. So in this sense alone, it is difficult to think of a more sustainable product than … Read More

Bar-top corks with wooden capsules

Over the last few years we have seen a strong growth in demand for bar-tops corks made with wooden capsules (also known as wood top corks) and here are a few things you may wish to consider if you are thinking of ordering some. The first thing to consider is what kind of wood you are going to use – … Read More

Cork House made from expanded cork

In the UK, the Stirling Prize is awarded to the country’s best new building and in the shortlist is a house made from expanded cork, built by Matthew Barnett Howland (see https://www.architecture.com/awards-and-competitions-landing-page/awards/riba-regional-awards/riba-south-award-winners/2019/cork-house ). Essentially he has used high density expanded cork blocks with a profile cut into the edge to allow them to fit together without glue. Originally expanded cork … Read More

Cork Forests – a 100% sustainable & unique ecosystem we need to preserve


Portugal is responsible for producing around 70% of the world’s cork and behind the supply of cork stoppers, cork insulation and other cork products is a unique environmental story. The cork oak tree can live for up to 200 years and cork is produced by stripping the bark from the tree, which then regenerates to be stripped again around 9 … Read More

Natural cork boxes

natural cork boxes

Generally for items made out of cork other than cork stoppers, agglomerated cork is used as it is by far the least expensive option. However, whilst natural cork stoppers can be made out of one piece of cork, to make larger items from natural cork, we need to take strips of natural cork and glue them together to create what … Read More

Cork granules for artificial turf infill


Over the past few years demand for cork granules to replace rubber for infill for artificial turf for football pitches and other sports surfaces has continued to grow. Here we will explain about the options available. Many artificial turf suppliers are responding to client concerns about using rubber as infill and cork granules is one of the few options for … Read More

Our expanded cork featured on Grand Designs

In 2017 we had a visit from Paul and Blanka Troop who were self-building an eco-house to be featured on the UK’s Channel 4 series, Grand Designs. They were determined to use only the most environmentally friendly materials for their house and they had concluded that expanded cork was the one of the most sustainable and effective ways to insulate … Read More

3 Densities of Expanded Cork

Expanded cork is made by taking resin rich cork granules (which come from the bark of the branches of Cork Oak trees), granulating it and then placing it in an autoclave where it is subject to heat and pressure. This process causes the granules to give up their resin, which in turn solidifies to glue the granules together to make … Read More

Bar top corks with capsules made from cork

The gin sector has undoubtedly been the most dynamic spirits sector in recent years and hardly a week goes by without a new artisan gin being launched with some exotic flavour or new marketing angle. Here at CorkLink we have seen a lot of enquiries from gin producers looking to produce an innovative cork and very popular has been the … Read More

Cork stools supplier

We have had a lot of requests for cork stools and cork tables recently – generally we produce cork stools according to client designs, but given the popularity we have now produced a range of cork stools and cork tables in both the standard wine cork cylindrical format and the mushroom style champagne cork stool. The cork tables we are … Read More

Expanded cork – the ultimate green insulation material

Expanded cork is never going to be as cheap as synthetic insulation materials (although given its extended lifespan and capacity to retain its structural integrity for decades, it can pay for itself over the long term), but in terms of helping the planet, there is no better insulation material. Cork itself is made by stripping the bark of the cork … Read More

Surface treatment for bar-top corks used for white spirits


One of the areas we specialise in here at CorkLink is making bar-top corks (also known as capsulated corks) for the spirits industry. Typically these corks are made with a much greater degree of customisation than wine corks, for several reasons: – there is a wide variety of bottle sizes used in the spirits industry – capsules can be made … Read More

How cork is harvested

Cork is made from the bark of the cork oak tree – every 9 years the bark of the tree is removed using a sharp axe and a lot of skill and the cork oak is one of the only trees in the world that can survive having its bark removed.The skill is to peel off slabs of bark without … Read More

Cork rolls for underlay / insulation

We supply cork rolls for underlay and insulation in two densities, 180-190 kg/m3 (CR21) and 200-220 kg/m3 (CR30) in thicknesses between 2mm and 8mm, with a minimum order of one pallet. As well as providing thermal insulation and elasticity, cork roll also offers acoustic insulation and is hypoallergenic. We have two densities of cork roll available – the standard one … Read More

Natural bonded cork or agglomerated cork for conical stoppers?

When making larger stoppers for jars, candle holders, jugs etc, you essentially have two options if you decide to go with cork. The more stand option is agglomerated cork which will look like the image above. If you would prefer to go for a lipped cork option (which allows for a shallower cork depth and looks more like a lid) … Read More

Natural cork vs plastic & aluminium


Across the world and in the UK in particular at the moment, there is a real movement to minimise the amount of plastic that is used in packaging and in the food & beverage sector in particular; the fact that we are tipping 8 million tonnes of plastic into our oceans every year is beginning to hit home with consumers … Read More

Portuguese cork industry has a record breaking year

Portugal is by far the largest cork supplier in the world and in 2017, sales reached €970 million, a record year. This growth has been fuelled by the popularity of all things cork, be it cork stoppers (73% of cork sales by value), decorative items, expanded cork insulation or other uses such as infill for synthetic sports pitches. Much of … Read More

Supplier of lipped cork stoppers

We supply conical cork stoppers of a wide range of sizes, starting from a few mms up to 20cm. As well as making conical corks in standard sizes and custom sizes, we also produced lipped corks such as the one shown in the image below. These corks generally have a shallower penetration into the jar or pot that they are … Read More

Expanded cork boards for underfloor insulation

Generally expanded cork is used to insulate the roof or walls of a building, but it can also be used to insulate the floor of a building, which is the case for a client we recently supplied in the UK. This client is trying to build a truly environmentally friendly house and chose expanded cork as the most effective, 100% … Read More

Expanded cork granules supplier

When expanded cork boards are initially produced in autoclaves with a size of 1000x500x300mm, sometimes the natural resin that binds the granules together has a fault line in it and the block will break. The same can happen when these large blocks are cut to size to make boards. So this expanded cork cannot be used to make boards, so … Read More

Expanded cork vs coarse granule cork insulation board

There are two great options for cork insulation boards that have some different properties as well as a different appearance, but both offer a natural way of providing acoustic and thermal insulation. The traditional solution is expanded cork, which is 100% natural and is made by super-heating cork granules which forces them to expand and release their resin, which then … Read More

Used port wine barrels for sale

We receive a number of requests from distillers looking for used port wine barrels and other refurbished fortified wine barrels, such as used sherry barrels. Whilst we do carry a reasonable stock, we do have a reasonably fast turnover so we can never be exactly sure what we will have available. Typically we have refurbished 225, 250 and 500 litre … Read More

How cork production sequesters CO2

Cork are made from the bark of the cork oak tree (known in Portugal as the “Sobreiro”). It takes 25 years from the germination of an acorn to the first harvest of cork bark after which the bark regenerates and can be harvested every 9 years. The beauty of this whole process is that the tree does not need to … Read More

Expanded cork furniture

Expanded cork is one of natures miracle products. It is made by granulating resin rich cork bark that cannot be used for wine corks. This cork is granulated and then pressure and steam are applied, which make the granules expand and release the resin, which acts as a natural binding agent to make blocks of cork. This expanded cork is … Read More

How cork is harvested

Here is a short video showing how cork is harvested. Note that cork is made from the bark of the cork oak tree (“Sobreiro” in Portuguese) – this is a unique tree that will regenerate its bark after is has been stripped off, so no tree are chopped down in the production of cork. These cork oaks can survive 200 … Read More

Cork memo board supplier

We supply cork memo boards (as well as white boards and chalk boards), generally in 3 sizes: 30x40cm, 40x60cm and 60x90cm, with a wooden frame. Our standard is to supply the memo boards with shrink wrap and pins included and we can add customer labels if required. For the cork memo boards there are two options – double side cork … Read More

1+1 technical corks supplier

5 years ago, 1+1 corks (also known as technical corks) were extremely popular in the market, but in more recent years they have been increasingly substituted by micro-agglomerated corks, which in our opinion is a shame for wine producers and wine drinkers and this is why: a 1+1 cork is made from an agglomerated cork body with a natural cork … Read More

Natural wine corks vs. screwcaps for decent wine


John Gilman writes the highly regarded wine newsletter View from the Cellar and it was great to hear the bile he had to direct at the overuse of screwcaps in the Australian wine industry in particular. In a piece he wrote for the celebrated blog, Dr.Vino , he expressed his mystification about why any wine really worth drinking that was … Read More