After having analyzed the deficiencies of the existing standard Particle powder

the advantages of standard particle-plate and the necessity of producing it were described.Then

according to the programe of designing standard particle-plate

what were descussed

in properorder

are the selecting of particle size distribution functions

the transform between masspercentage distribution functions and number percentage distribution functions

the determination of total particle number on the plate

the classification of particles

the determinationof the representative diameter of each class particles

and the random distribution of the particles

positions on the plate. lastly

a simulated design example

which was done with a computer

was glven.