Gilashi tare da danniya mai matsi a saman gilashin da aka tsananta, wanda aka fi sani da ƙara ƙarfin gilashi. Gilashi ya sami ƙarfi ta hanyar tsaurarawa, wanda ya fara a Faransa a cikin 1874. Kunshin gilashin zafin jiki yana da halaye na ƙimar marufi masu nauyi da kuma buƙatun aminci masu yawa. Yanayin kwali ne don amfani da band din roba na PET. Yana da fa'idodi na kwanciyar hankali na kwalliya mai kyau, aminci, ƙarancin farashi da sauƙi sufuri.