Clean sense of scent for sham­poo

The Star Early Edition - - OPINION & ANALYSIS -

THERE’S noth­ing like that just-washed fra­grance you get from your hair after a shower.

And now sci­en­tists have come up with a way to let you to en­joy that “clean” scent for as long as 24 hours.

Sham­poo strips hair of the nat­u­ral oils and grease that help smells cling to strands. That means the pleas­ant odours of sham­poo and con­di­tioner tends to dis­ap­pear within a few hours.

But re­searchers have de­vel­oped tech­nol­ogy that binds fra­grances from sham­poo to the sur­face of hair so that the smell is grad­u­ally re­leased.

Dr An­dreas Herrmann, a chemist at fra­grance firm Fir­menich, worked with the Swiss Fed­eral In­sti­tute of Tech­nol­ogy on the break­through. He said they hoped it might lead to new types of sham­poo with longer-last­ing fra­grances.

Herrmann said: “Fra­grance is usu­ally one of the most ex­pen­sive in­gre­di­ents in a sham­poo, but typ­i­cally they only last a few hours on hair.”

The re­searchers, whose work was pub­lished in the jour­nal Ap­plied Ma­te­ri­als And In­ter­faces, pack­aged the fra­grance inside cap­sules that were many times smaller than the width of a hu­man hair. Then, to get them to stick to hair, they stud­ded the cap­sules with short frag­ments of pro­tein.

The fra­grance is re­leased over 24 hours as the cap­sules burst grad­u­ally.

Herrmann said “fur­ther test­ing would be needed to en­sure they did not af­fect comb­ing or dry­ing.”

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