Cajalad laba-geesood ah ayaa laga sameeyay warqad, maro, filim caag ah sida substrate-ka, ka dibna nooca elastomer-ka cadaadiska xasaasiga ah ee xabagta ama xabagta cadaadiska-xasaaska ah ayaa si siman loogu dahaadhay substrate-ka sare.Cajaladda koollada oo duuban waxay ka kooban tahay saddex qaybood: substrate, koollada iyo warqadda sii deynta (filim).