Patent ID: 6573105
Filing Date: 2003-06-03
Classification: G01N,G03G

Abstract:
A test method for a coating liquid for an electrophotographic photoconductor, wherein the coating liquid is for an undercoating layer, a charge generation layer, or a charge transport layer of the photoconductor, the method comprising:calculating a peak area ratio of at least first and second components in a coating liquid by pyrolysis gas chromatography, the first and second components being selected from at least one of: pigment, a resin, an organic solvent, and water, comparing the peak area ratio of the first and second components with a pre-calculated peak area ratio of the components in a reference coating liquid having a known content of the components, to determine the weight percentage of at least one of the components in the coating liquid, and wherein the pyrolysis gas chromatography used for calculating the peak area ratio of the first and second components comprises dropping a given weight or volume of the coating liquid onto a pyrofoil, wherein a temperature of the pyrofoil is determined by the component to be analyzed, and putting the pyrofoil into a pyrolyzer to vaporize the coating liquid which is then introduced to a gas chromatograph.