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so in mixture of oils and pure rosemary and sage oil. ITSAPT seminar, Guimaraes, November 2022 ? Untreated textile material and crosslinking reagent do not contain formaldehyde (7 mg/kg). ? Microcapsule’s walls contribute to the amount of of the formaldehyde significantly: ?The average formaldehyde content for the microencaptulated textile material with empty microcapsules is 715 mg/kg and 766 mg/kg for microencaptulated textile material with microcapsules filled with oils (both results are obtained by Japan Law method). ? Results from AATCC test for the same samples are mg/kg and mg/kg respectively. . Results and conclusions ITSAPT seminar, Guimaraes, November 2022 Results obtained by HPLC method: ? indicate that only formaldehyde is released from the textile samples microencaptulated with and without essential oil. ? Although some amount of formaldehyde is proved in pure essential oils, amount of essential oil which is applied on textile material with microcapsules (160 g/m2) contribute very little to total amount of formaldehyde. This was proved by the measurements of released formaldehyde after the mechanical damages of microcapsules on the textile substrate ITSAPT seminar, Guimaraes, November 2022 ? Lavender: 0,54 ml/L ? Rosemary: 0,15 ml/L ? Sage: 0,32 ml/L mixture of essential oils : ? Average amounts of formaldehyde: 0,61 ml/L ? Results: from 0,18 to 0,75 ml/L (dependent on extraction conditions) Formaldehyde measurements in essential oils: ITSAPT seminar, Guimaraes, November 2022 Conclusion ? Results given by AATCC test 1121978 method are expected proportionally higher as results given by EN ISO 141841 method. ? The average results obtained from samles prapered in production line are lower. Those samples satisfy ecolabeling system’s requirement. The explanation for this phenomenon is found in different processes of curing and drying. ? By HPLC it was proven that there are no other aldehydes or ketones present on microcapsulated textile materiale It was proven that the amount of formaldehyde in essential oils is negligible ? Microcapsule’s wall contributes to the highest degree of the amount of formaldehyde ? After washing of textile substrate, the results are considerable lower