The divider "La Traviata" is made of 25 mm thick Ethafoam inert material; is proposed in a standard dimension with a length of 1200 mm, channels 5 mm wide and 10 mm deep. It can be easily cut and glued to fit vertical storage boxes. Particularly suitable for the safe storage of negatives in glass plates, suitably stored in Verdi or Boito 4-fold paper envelopes