t us ▁w are ▁from ▁the ▁same ▁region . ▁Its ▁best ▁period ▁last ed ▁until ▁the ▁late ▁ 1 6 th ▁century . ▁ ▁It ▁consists ▁of ▁a ▁body , ▁s lip , ▁and ▁gla ze , ▁where ▁the ▁body ▁and ▁gla ze ▁are ▁“ qu art z - f rit .” ▁The ▁“ f rit s ” ▁in ▁both ▁cases ▁“ are ▁unusual ▁in ▁that ▁they ▁contain ▁lead ▁ox ide ▁as ▁well ▁as ▁s oda ” ; ▁the ▁lead ▁ox ide ▁would ▁help ▁reduce ▁the ▁thermal ▁expansion ▁coefficient ▁of ▁the ▁cer am ic . ▁Micro scop ic ▁analysis ▁reve als ▁that ▁the ▁material ▁that ▁has ▁been ▁l abeled ▁“ f rit ” ▁is ▁“ inter st it ial ▁glass ” ▁which ▁serves ▁to ▁connect ▁the ▁quart z ▁particles . ▁Michael ▁S . ▁T ite ▁arg ues ▁that ▁this ▁glass ▁was ▁added ▁as ▁f rit ▁and ▁that ▁the ▁inter st it ial ▁glass ▁formed ▁on ▁firing . ▁ ▁The ▁ 1 5 th ▁century ▁saw ▁the ▁fin est ▁period ▁of ▁the ▁His p ano - M ores que ▁w are ▁of ▁Val encia , ▁produced ▁by ▁largely ▁Muslim ▁pot ters ▁in ▁a ▁Christian ▁kingdom , ▁though ▁the ▁southern ▁industry ▁cent red ▁on ▁M ál aga ▁had ▁ended ▁by ▁the ▁mid - century . ▁ ▁Pers ian ▁pot tery ▁under ▁the ▁Saf avid ▁dynast y ▁( from ▁ 1 5 0 2 ) ▁was ▁also ▁heavily ▁influenced ▁by ▁Chinese ▁blue ▁and ▁white ▁por cel ain , ▁which ▁to ▁a ▁large ▁extent ▁replaced ▁it ▁in