TCVN 11606-2016 is a Vietnamese national standard, equivalent to the international standard ISO 17132:2007, specifying the T-bend test method for paints and varnishes. The standard aims to evaluate the flexibility and adhesion of organic coatings on metal substrates by observing whether cracking or shedding occurs when the specimen is bent. It is suitable for determining whether paints, varnishes and related products meet specific bending test requirements, or to determine the minimum bending diameter without causing cracking. The standard describes in detail the test procedures, sample preparation, coating thickness measurement and result report, providing an important basis for the quality and performance evaluation of coating products.