I-rosin resin SOR 424 iyinhlaka eguquliwe enombala okhanyayo futhi ezinzile, esekelwe ku-rosin kanye ne-polyacid engagcwele njengezinto zokusetshenziswa eziyisisekelo.I-rosin kanye ne-anhydride yesilisa yokusabela okungeziwe kanye ne-esterification ye-pentaerythritol, futhi ithuthukiswe ngokucwengisiswa, i-decolorization, ukuguqulwa nezinye izinqubo.I-varnish ekhiqizwa yiyo inezinzuzo zokukhanya okuphezulu, ukuqina okuphezulu nokunamathela okuqinile.