A combustible heat source (2c) for a smoking article has a barrier (6) affixed to an end face thereof. A thermally-activated adhesive (8b) is provided between the end face of the combustible heat source (2c) and the barrier (6). A moisture-activated adhesive (10b) may be provided between the end face of the combustible heat source (2c) and the thermally-activated adhesive (8b). A method of manufacturing a combustible heat source (2c) having a barrier (6) affixed to an end face thereof comprises: providing a thermally-activatable adhesive (8a) between the end face of the combustible heat source (2b) and the barrier (6)； affixing the barrier (6) to the end face of the combustible heat source (2b)； and heating the combustible heat source (2b) with the barrier (6) affixed to the end face thereof to activate the thermally- activatable adhesive (8a).Mevcut buluş, örneğin bilhassa iyodoproparjil bileşikleri gibi en az bir veya daha fazla biyositi ve ayrıca en az bir melamin formaldehit polimerini içeren mikrokapsüller ile, bu tür mikrokapsüllerin üretilmesi için bir yöntem ile ve bunların teknik malzemelerin korunması amacıyla kullanılması ile ilgilidir.
