Preventing unintentional revelations – Researchers tackle unintentionally transparent clothing

Researchers at the Hohenstein Institute in Bönnigheim, in cooperation with their project partner Eschler Texti, are working hard on finding a way of being able to give an objective evaluation of the specific degree of transparency or opacity of textiles and also control it.

In this “hands-on” research using volunteers with different skin types, existing measuring methods already used in paper-making are to be transferred to real-life conditions in the textile industry. Participants in the optical trials assessed the transparency of a piece of white test fabric by means of a questionnaire. The findings from the tests will then be confirmed using actual skin types and finally converted into an objective method for classifying transparency.

As well as evaluating degrees of opacity, the project will also come up with guidelines for controlling transparency by the thickness and composition of the yarn. This will mean that in future the required degree of opacity will be able to be defined and applied/set, even as textile materials are being constructed. In a further stage of the project, researchers will also investigate the effect of external influences such as wetness on the transparency of textile materials.

However, project leader Julia Gündel is reassuring: “Where they are still desirable, for functional reasons or in order to be fashionable, transparent textile materials will still be available.” And surely it won't only be the organisers and participants in wet T-shirt competitions who will be pleased about that!

We are grateful to the Research Association the Textile Research Council for its financial support for ZIM project no. KF2136705HG9, which was provided via the Federation of Industrial Research Associations AIF as part of the Central Innovation Programme SME, with funds from the Federal Ministry of Economics and Technology (BMWi) following an Order by the German Federal Parliament.