A châng chuan, rubber compound hmanga transparent emaw semi-transparent products siam a nih chuan a yellow thei bawk. A bik takin secondary vulcanization hnuah chuan yellowing phenomenon chu a lang chiang zawk a ni.
A chhan pakhat chu yellowing a nih chhan pakhat chu silica hian bawlhhlawh a pai thei a, temperature sang takah oxidation a awm avangin yellow a ni thei bawk. A pahnihna chu raw rubber-a residual trimethylamine chu coloured gene-ah a oxidized a ni. Pathumnaah chuan, peroxides decomposition hian yellow substance a siam thei bawk.
Yellowing hneh tur chuan silica chi hrang hrang, yellowing duh lo zawk thlan chhuah ngaihven a ngai a, hydrogen-Containing silicone oil leh anti-yellowing agents dangte chu compound rubber formula-ah dah a ngai a, chutih rual chuan raw rubber quality tihsan chu ngaihven bawk ang che. Low-molecular-weight substance lakchhuah te hi hman nawn leh loh tur a ni. A tawp berah chuan anti{-yellowing vulcanizing agents hmang hian anti-yellowing effect a awm thei bawk.