1, calcite quality standards 
    CaO Fe2O3 acuities were 54.5% and 0.020% or higher 
    Size: + 10-120 visual acuities were 0% and 45% or less 
    Uniform particles White noise free 

2, lithium China stone quality standards 
    AL2O3 14% Li2O acuity 14% or higher 
    Granularity of Fe2O3 0.07% or less: + 20 visual acuities were 0% 
    - 120 mesh 40% or less 
    Uniform particles No precipitation block 

3, China clay quality standards 
    AL2O3 16.0% Li2O acuity 16.0% or higher 
    Granularity of Fe2O3 0.07% or less: + 20 visual acuities were 0% 
    - 120 mesh 20% or less 
    Uniform particles Dry with no noise