Our contribution to the work of I.W.T.O., and in particular to that of its Technical Working Groups, has been and remains important. Our work has served as a reference and a starting point for many reports and studies.
Finally, we would like to draw attention to the fact that this very positive state of affairs is to a large extent due to our Presidents – our founder President Walther DELIUS first of all, then Ralph HULLAH, Richard BOWNASS, Umberto FRACASSI, Yves GRAUX and William AINSWORTH. Nor should we forget to mention the members of the Management Committee who devote so much of their precious time to these activities which are essential to the further progress of INTERWOOLLABS.
Harmonisation of wool textile laboratories has been gradually achieved thanks to the establishment of regular strict controls to which Members must submit; these controls have been made possible by a system of round-tests carried out every six months.
During these round-tests, laboratories are asked to measure the fineness (or the length) of a certain number of samples which are sent to them and which have been obtained from the same lot, previously homogenised. The results are then studied in complete anonymity, through a code-number guaranteeing total confidentiality of individual results. If their results are found to be within the Association's limits of acceptance, in relation to the overall average obtained by all participants, laboratories are considered and recognised to be 'calibrated' and calibrated and receive INTERWOOLLABS' calibration stamp, valid for one year for the measurements in which round-test results have been found satisfactory. On the other hand, in the event of excessive deviations in their measurements, laboratories are obliged to undertake a re-test, and if difficulties encountered persist, the Association offers its help in order to resolve the problems.
The results obtained in inter-laboratory harmonisation may be considered to be most satisfactory.
Each year Interwoollabs submits a report to the Raw Material Group of the IWTO summarising the results of the inter-laboratory harmonisation Round Tests.