a)
b) l at the eaves are not more than 0.40 m 6 folds) fabric Consumption: h de frill + 5 cm treatment b) l on the ledge more than 0.40 m and the number of folds more than six - is hidden by the warp threads (turns)
Fabric consumption: l eave + the total number of folds x 16 (18) cm + 6 cm (treatment)