Sampela taim, taim ol i yusim ol raba kompaun bilong mekim ol prodak i klia o i semi- i go long narapela rot, ol i ken kamap yelo. Moa yet bihain long seken vulcanization, dispela samting i kamap yelo i kamap klia moa.
Wanpela as bilong mekim i kamap yelo em olsem silika inap i gat ol pipia i stap na kamap yelo bikos long oksidesen long bikpela tempereja. Namba tu em olsem, ol i save oksidaisim ol samting i stap yet long raw raba long raw raba. Namba tri, taim ol peroksaid i bagarap, dispela tu inap kamapim ol yelopela samting.
Bilong daunim yelo, em i mas lukluk gut long makim ol kain silika we i no save kamap long rot bilong yelo, putim haidrojen-} i gat silikon oil na ol narapela anti-yellowing ejen i go long kompaun raba fomula, na long wankain taim, putim gut tingting long kamapim gutpela kwaliti bilong raba raba. Ol samting i stap daunbilo{{}}}}weit samting ol i rausim, ol i no ken yusim gen planti taim. Laspela, ol anti{6}}yeloim ol vulkenaising ejen inap tu long yusim long winim anti-yeloing efek