Impamvu yo gufata isahani, irerekana ko firime yumye hamwe no guhuza isahani yumuringa idakomeye, kuburyo igisubizo cyibisahani cyimbitse, bikavamo igice cya "negative phase" igice cyo gutwikira umubyimba, abakora PCB benshi biterwa nimpamvu zikurikira :

1. Ingufu nyinshi cyangwa nkeya

Munsi yumucyo ultraviolet, fotoinitiator, ikurura ingufu zumucyo, igabanyamo radicals yubuntu kugirango itangire gufotora monomers, ikora molekile yumubiri idashonga mumuti wa alkali.
Mugihe cyerekanwe, kubera polymerisike ituzuye, mugihe cyiterambere, firime irabyimba kandi yoroshya, bivamo imirongo idasobanutse ndetse na firime ya firime, bikaviramo guhuza nabi film numuringa;
Niba guhura ari byinshi, bizatera ingorane ziterambere, ariko kandi mubikorwa bya electroplating bizatanga ibishishwa byangiritse, gushiraho isahani.
Ni ngombwa rero kugenzura ingufu zigaragara.

2. Umuvuduko mwinshi wa firime

Iyo umuvuduko wa firime uri muke cyane, hejuru ya firime irashobora kuba itaringaniye cyangwa ikinyuranyo hagati ya firime yumye hamwe nicyapa cyumuringa ntigishobora kuba cyujuje ibisabwa imbaraga zihuza;
Niba umuvuduko wa firime ari mwinshi cyane, ibishishwa hamwe nibihindagurika byurwego rwo kurwanya ruswa irashobora guhindagurika cyane, bikaviramo firime yumye gucika intege, guhungabana amashanyarazi bizahinduka.

3. Ubushyuhe bwo hejuru bwa firime

Niba ubushyuhe bwa firime buri hasi cyane, kubera ko firime irwanya ruswa idashobora koroshya neza kandi ikagenda neza, bikavamo firime yumye hamwe na laminate yambaye umuringa wambaye nabi;
Niba ubushyuhe buri hejuru cyane bitewe no guhumuka byihuse bya solvent hamwe nibindi bintu bihindagurika mukurwanya kwangirika kwangirika, kandi firime yumye igacika intege, mumashanyarazi ya electroplating shitingi yibishishwa byangiza, bikavamo percolation.