Norm Lead Lokaci:

loos tattarawa 
pallet tattara wasu shiryawa kamar yadda abokin ciniki ya nema

Akwai nau'ikan fina-finai iri-iri iri daban-daban da ake samu a kasuwa, lokacin siyan silima a Chennai ana buƙatar sanin wane aji da nau'in finafinai ake buƙata.
Yi la'akari da yanayin sama na MR vs. BWR. Sau da yawa mutane suna tunanin Danshi danshi yana ma'anar kare ruwa. Duk da haka wannan ba shine batun ba.

BWR - Ana amfani da sinadaran Phenol formdehyde na man shafawa cikin abubuwan. Wannan resin roba ne mai roba.
MR - Ana amfani da resin Urea formaldehyde don ɗaure abubuwan jingina ga juna. Ba a dauki resin UF yana da tsabtace muhalli ba.

Wasu masu siyar da sikari sun yi kuskure (ko kuwa da gangan ne?) Suna sanar da abokan ciniki cewa fina-finai na ruwa iri ɗaya ne da na fim ɗin BWR mai hana ruwa. Wannan ba haka bane. Pan fim na ruwa shine mafi kyawun fim wanda aka yi amfani dashi wanda ba'a iya amfani da shi (resiluted) phenolic resins don manne abubuwan haɗin tare, wanda yasa ya fi karfi. Jirgin ruwan ana amfani da shi ne don matsanancin yanayin amfani, kamar don yin kwale-kwale da jiragen ruwa ko wasu kayan aikin kogin, inda faranti tabbas zai zama kuma ya kasance tsawon rigar tsawon lokaci.