Show I I It Its It's ft Nap Not Material That Makes Makis Blanket Warm Many of us u still believe In the theold old idea that if ii we put enough heavy blankets over us we will deep warm In the coldest weather How- How However However ever er textiles specialists say II tests hay have shown hown that warmth does not no depend as a much on the weight of the blanket at II It does on the nap of ot the material Napped fabrics have the th ability to form a barrier through which heat helt does doa doe not flow readily This makes m ke them warm A heavy ma- ma material ma without Without a good nap would not be as a warm as 81 a lighter napped material because it would let the body heat escape more quickly Tests Teats also alIo have revealed that the warmth of a new blanket depends more mar on the nap than on the fiber content A new blanket that was part wool and part rayon was wasas I as as 8 warm as one that was wai per percent percent cent wool However tests testa made aft aft- after er the blankets had been blen laundered or used uneS showed quite different re re- re suits Wool fiber will spring back to Its original position in the nap after being laundered or used Oth Oth- Other er fibers do not net This explains explain why I wool an-wool blankets or fabrics fabrici will keep I their warmth and qualities wool part ones on will not nol |