Cork quality is identified by a grading system based on the visual quality of the cork. Whilst all cork companies use this method to differentiate between higher and lower grade corks, there is no set measurement for what constitutes a particular grade. Ie: One company’s “Ref 2” cork may not be the same quality as another’s.
When corks are graded, due to the natural variation from one cork to the next, a single grade of cork will include a small percentage of lower and higher grade corks. This is called a quality curve. The majority of the corks will fall within the parameter of that grade.
Good Example of a 'C' Grade Cork
Bad Example of a 'C' Grade Cork
It is important when considering pricing of cork, that you are comparing ‘apples with apples’.
Amorim will happily take a sample of the corks (100 minimum required to get representative grade) you currently use for analysis against Amorim’s internationally approved grading system. This will allow us to provide you with an accurate price which reflects the exact grade you require.
Cork grades apply to Natural Corks, Sparkling and Twin Tops.