Feem ntau, qhov "ntub txheej txheem" flux feem ntau muaj ob hom nram qab no:
Ib hom siv ammonium chloride (NH₄Cl) ib leeg ua tus flux. Lwm hom siv kev sib xyaw ntawm ammonium chloride thiab zinc chloride (ie, ZnCl₂·2NH₂Cl los yog ZnCl₂·3NH₄Cl) ua cov flux. Tsis tas li ntawd, qee qhov glycerol (kwv yees li 6% ntawm qhov hnyav ntawm qhov flux) lossis glycerin (kwv yees li 1% ntawm qhov hnyav ntawm qhov flux) ntxiv. Cov tshuaj ntxiv xws li sawdust lossis qab zib kuj tseem tuaj yeem suav nrog rau lub hom phiaj foaming, uas pab khaws cov dej noo hauv flux.
