1. Formaldehyde. Dangane da ka'idodin ƙasa, ƙayyadaddun watsi da formaldehyde don toshe allo ta amfani da hanyar ɗakin yanayi shine E1 Kasa da ko daidai da 0.124 mg/m³. Rashin bin -a'idar blockboard da ake sayarwa a kasuwa tare da ka'idojin fitar da iskar formaldehyde ya shafi bangarori biyu: na farko, fitar da formaldehyde ya zarce ma'auni, yana haifar da babbar barazana ga lafiyar dan adam; na biyu, wasu samfuran, kodayake fitar da su na formaldehyde yana cikin matakin E2, ba su kai matakin E1 ba, duk da haka ana yi musu lakabi da E1. Wannan kuma ana ɗaukarsa rashin yarda da -.
2. Ƙarfin Lankwasawa Mai Wuta. Ƙarfin lanƙwasawa mai jujjuyawa da ƙarfin haɗin kai yana nuna ƙarfin samfuran blockboard don ɗaukar kaya da tsayayya da nakasawa a ƙarƙashin damuwa. Babban dalilai na rashin bin - a cikin juzu'in ƙarfin lankwasawa mai jujjuyawa shine sau uku: na farko, lahani ko lalacewa a cikin albarkatun ƙasa da kansu, wanda ke haifar da rashin ingancin asali; na biyu, ingantattun dabarun rarraba kayan aiki yayin samarwa; na uku, manne mara kyau.
3. Ƙarfin Ƙarfi. Ayyukan haɗin gwiwa ya ƙunshi sigogi guda uku: lokaci, zazzabi, da matsa lamba. Adadi da hanyar amfani da manne suma suna shafar fihirisar fitar da iskar formaldehyde.
4. Abubuwan Danshi. Abun ciki yana nuna danshin abun ciki na plywood. Idan abun ciki na danshi ya yi yawa ko rashin daidaituwa, samfurin na iya lalacewa, kokewa, ko zama mara daidaituwa yayin amfani, yana shafar aikin sa.