WARNING: Personnel using this standard should have practical experience in formal laboratory work. This standard does not address all possible safety issues. It is the user's responsibility to take appropriate safety and sanitation measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. This standard specifies the method for preparing a homogeneous dry rubber film without air bubbles from concentrated natural rubber latex. This standard applies to Hevea brasiliensis latex. Not necessarily suitable for other natural latex, compound latex, vulcanized latex, water cement and synthetic latex.