Process for working hairs on a head, in particular to obtain the so-called "permanent" effect, comprising the steps of: - preparing the hairs, wherein the step of preparing the hairs comprises the steps of washing the hairs with two shampoo applications, applying the conditioner balsam or the mask to make the hairs softer, rinsing and buffering the head; - proceeding to partition the head into six ordered and progressive sections, namely front central, front left, front right, rear central, rear left and rear right; - after having partitioned the head in many areas to which at least one tuft corresponds, combing the tuft itself for all its length; - assembling a soft hair-curler, winding onto the hair-curler itself the tuft being taken, starting from the tip, previously protected with a net, till the head is reached, said flexible hair-curler comprising at least one containing means, at least one metallic core, and at least one closing element adapted to close an end of said containing means, said metallic core being immersed inside said containing means; - blocking the flexible hair-curler without elastics, only through a slight pressure of the two ends of the hair-curler from top to bottom; - going on partitioning and winding the tufts in the soft hair-curler till its barycentre; - applying and blocking the hair-curler for the whole head roundness, always following the established partitioning into sections with the above mentioned order; - for the side, assembling the hair-curlers from top to bottom till their barycentre is reached, partitioning the hair tufts; - for the rear side, assembling the hair-curlers from top to bottom, closing the soft hair-curler; and - performing the above steps for all originally established areas for the head. - preparing the hairs, wherein the step of preparing the hairs comprises the steps of washing the hairs with two shampoo applications, applying the conditioner balsam or the mask to make the hairs softer, rinsing and buffering the head; - proceeding to partition the head into six ordered and progressive sections, namely front central, front left, front right, rear central, rear left and rear right; - after having partitioned the head in many areas to which at least one tuft corresponds, combing the tuft itself for all its length; - assembling a soft hair-curler, winding onto the hair-curler itself the tuft being taken, starting from the tip, previously protected with a net, till the head is reached, said flexible hair-curler comprising at least one containing means, at least one metallic core, and at least one closing element adapted to close an end of said containing means, said metallic core being immersed inside said containing means; - blocking the flexible hair-curler without elastics, only through a slight pressure of the two ends of the hair-curler from top to bottom; - going on partitioning and winding the tufts in the soft hair-curler till its barycentre; - applying and blocking the hair-curler for the whole head roundness, always following the established partitioning into sections with the above mentioned order; - for the side, assembling the hair-curlers from top to bottom till their barycentre is reached, partitioning the hair tufts; - for the rear side, assembling the hair-curlers from top to bottom, closing the soft hair-curler; and - performing the above steps for all originally established areas for the head.