At MANUEL SERRA we are especially strict with quality control, far beyond that required by the regulations.

Our laboratory conducts exhaustive physical and chemical parameter checks, and with every dispatch we attach a report that includes the following concepts: dimensional control, humidity, density, microbiology, extraction force, elastic recovery, residual powder, residual peroxide, capillarity, sensory analysis and organochloride analysis. We outsource the organochloride analyses, and inform the clients about the laboratory which has carried them out.

The methodology applied in our laboratory tests is governed by the UNE/ISO regulations. We are registered in the Interlab network and we have the ISO 2200 and SYSTECODE certificates granted by the European Cork Confederation (CE Liège).

Our facilities also undergo the most rigorous checks: environmental microbiology and TCA analysis, verification and acceptance of auxiliary materials, analysis of cardboard boxes, bags, chemical products, with their corresponding FDA certificates.


We take pride in preserving a tradition of over 100 years, but we also take pride in keeping an open mind to learning and placing the most cutting-edge science and technology at the service of this tradition.

We constantly invest in RDI, and in studying the application of the latest technology to the various production and control processes, in developing internal projects and innovating in the vision of the organisation’s various departments. All this leads us to trust in the future. 

Our main innovation is MS Blue System Cork, our own exclusive procedure that minimises the presence of trichloroanisole (TCA) and other unwanted volatile compounds, in addition to neutralising the aromas of the raw material. We submit each and every one of our stoppers to this process.

In addition, at the client’s request, we also apply a manual sniffing test, stopper by stopper. The stoppers checked using this innovative system are marked with a letter Σ, as an additional guarantee of quality.

We take part in the following research projects:

  • Study of the cellular structure according to the cork’s growth type. In collaboration with the University of Girona (UdG).

  • Analysis of the chemical composition of the surface treatment products, aimed at optimal bottling.  In collaboration with the Chemical Institute of Sarria (IQS).

  • Ageing of finished cork stoppers depending on the type and dose of surface treatment using time acceleration with a climatic and analytical chamber using FTIR spectroscopy. Collaboration with the Catalan Cork Institute (ICSuro).

  • Study of the oxygen permeability of the different types of seal. In collaboration with ICSuro and other cork production companies.

  • Study aimed determining the oxygen permeability in the various production conditions of cork stoppers and the effect of this parameter on still and sparkling wine. In collaboration with ICSuro and other cork production companies.

  • Study of the chemical composition of cork according to its origin. In collaboration with ICSuro.

  • Internal research on liquid tightness according to density, stopper type and surface treatment.

  • Study of the extraction force according to the dose and type of surface treatment used, by means of FTIR spectroscopy.

  • Study on enhancing the speed of surface treatment equipment, to standardise the surface treatment of the stoppers as far as possible.

  • Study of the compression and friction force according to the dose and type of surface treatment used.

  • Study of the mechanical behaviour of the stopper, according to the degree of humidity and the cork’s growth type.

  • Development of the aroma detection system in cork stoppers, using microelectronic detectors. Project co-financed by European Funds for Regional Development of the European Union within the framework of the 2014-2020 Catalan FEDER operating programme.

  • Study on sniffing methods and subsequent validation of the manual stopper-by-stopper sniffing process.

  • Research on the reduction of volatile compounds and organochlorides in cork with the Blue System Cork system.