Journalist and blogger Manu Carvalho has written about the effects of non - invasive skin dye Silhouette Soft , after her mother tried it out . Hahahaha Antes x Depois Sobre Carvalho wrote that the threads , made of polylactic acid , are sewn deep into the skin , where they stimulate collagen synthesis , plumping out flesh and strengthening the skin , before slowly relaxing . The effects , Carvalho wrote , last for around two weeks .
Journalist and blogger Manu Carvalho has written about the effects of non - invasive skin dye Silhouette Soft , after her mother tried it out . Carvalho wrote that the threads , made of polylactic acid , are sewn deep into the skin , where they stimulate collagen synthesis , plumping out flesh and strengthening the skin , before slowly relaxing . The effects , Carvalho wrote , last for around two weeks .