Firimu rakatarisana neplywood imhando yakakosha yeplywood yakavharwa mativi ese neine isingapfeki, isingapinde mvura firimu.Chinangwa chefirimu ndechekudzivirira huni kubva mumamiriro ezvinhu akaipa ezvakatipoteredza uye kuwedzera hupenyu hwebasa replywood.Iyo firimu imhando yepepa yakanyoroveswa mu phenolic resin, kuti iomeswe kune imwe nhanho yekurapa mushure mekuumbwa.Pepa remufirimu rine nzvimbo yakatsetseka uye inoratidzirwa nekusapinda kwemvura kusapfeka uye kusagadzikana kwekuora.