IS 1477:1982 Part 1 is the Indian Standard (BIS) for methods of sampling and test for varnishes and lacquers: part 1 general. This standard specifies general methods for sampling, preliminary examination, and preparation of test panels for varnishes and lacquers. It establishes baseline conditions and procedures for evaluating coating properties.
Specifies general methods of sampling and testing for varnishes and lacquers.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Standard Temperature for Testing | 27 ± 2 °C | 23 ± 2 °C | ISO 1513:2010 |
| Standard Relative Humidity for Testing | 65 ± 5 % | 50 ± 5 % | ISO 1513:2010 |
| Minimum Sample Conditioning Time | Not specified (Implied to be until thermal equilibrium is reached) | Minimum 16 hours at standard conditions | ISO 1513:2010 |
| Sample Container Material | Clean, dry, airtight tin or glass containers | Shall be made of a material which does not react with the product; opaque if product is light-sensitive | ISO 15528:2020 |
| Agitation of Sample | Mix thoroughly by shaking or stirring until homogeneous. | Mix by a mechanical shaker or by hand stirring until homogeneous, specifying shaker use for certain product types. | ISO 1513:2010 |
| Sampling from Large Drums (>25 L) | Take samples from three levels (top, middle, bottom) and mix. | Use a tube sampler to take a core sample, or sample from multiple levels (top, middle, bottom) and combine. | ISO 15528:2020 |
| Guidance on Sample Quantity | Prescribes specific volumes based on container size (e.g., 1 litre from a 20-litre drum). | Recommends a quantity at least 1.5 times that required for all specified tests. | ISO 15528:2020 |