Whatever its characteristics, the castanets must be temperate in order to reach its complete sonority. You can achieve this only making them sound during many hours. Then you will have to take precautions: do not leave them “naked” after using them, put them in their cover.
The humidity and the extreme temperatures are harmful, and can cause breaks and cracks. For the castanets’ fabrication we join the traditional knowledge and the technique in order to obtain a solid castanet, which gives to the professional dancer an instrument with a precise and right sound.