Ano o lalo kāʻei hana o na papa o kau ea canvas, a tuko pu me pokole a hamama-aoao elua. Helehelena ioiinyony: tensile ikaika nui preload e malama i ka pono hana, maikai ona mau ia'ku, aka, uuku overload, wela, ka aila, a me na ilihune.

Ano o lalo kāʻei palapala hoopaa pu ia ma ka vulcanization palupalu leki, maikai flex ia'ku, e like me ka oaoieei-kiʻekiʻe me ka i lalo hopena ano o māhele i kāʻei pau ole a me ka palahalaha kāʻei.

Ka loa o ka poe i lalo kāʻei e like me ka nui pono e intercept, a laila, kūkulu huiʻia. Oeaeo kāʻei i lalo kāʻei ami e kumu like anapuni aoao kihi, i mea e pale aku haoʻa ikaika, hōʻeleu i poino.