Amapangidwa ndi kukonzedwa pogwiritsa ntchito zinthu zapamwamba kwambiri komanso zosagwirizana ndi PP, zomwe zimakhala ndi asidi ndi alkaliresis Kulimbana ndi madontho amafuta, zopanda poizoni komanso zopanda fungo, komanso motsatira zofunikira zachilengedwe. ℃℃.