IS 5257 : 1969 Specification for eyepiece and screen graticule for determination of particle size of powders

1 Scope

1.1 This standard specifies requirements for the design andconstruction of eyepiece and screen graticules used in opticalmicroscope employed for determining the particle size of powders(see IS 5258 : 1969).

2 Reference

IS 5258 : 1969Determination of particle size of powders by opticalmicroscope methods