Yihoo An1520 ni amazi menshi abujijwe ahanganye na antioxyter antioxident, ishobora kunoza itunganijwe no gutuza mu kirere icyarimwe; Ibicuruzwa bike byamazi. Ahanini birakwiriye: reberi ya synthique na elanthique, nka: br, sbr, nbr, ir, sb, ss na reberi, latex, abafunze.