Iziphawuli zebhodi emhlophe luhlobo lwepeni yokumakisha eyenzelwe ngokukodwa ukusetyenziswa kwiindawo ezingenazo iiplanga njengeebhodi ezimhlophe, iglasi. Ezi ziphawuli ziqulethe i-inki eyomisa ngokukhawuleza enokuthi isuswe lula ngelaphu elomileyo okanye irabha, izenze zilungele ukubhala okwexeshana.