Image formation apparatus having a function to make processing speed for image formation changeable

A control method for an image formation apparatus which has a function to make processing speed for image formation changeable, said method comprising:

• an image formation step of forming plural images for measurement on an image support body at first processing speed;
• a measurement step of measuring densities of the formed images for measurement;
• a first determination step of determining an image formation condition at said first processing speed on the basis of the measured densities, and storing the determined condition in a memory;
• and
• a second determination step of determining the image formation condition at second processing speed different from said first processing speed, by correcting the image formation condition at said first processing speed stored in said memory.

An image formation apparatus which has a function to make processing speed for image formation changeable, comprising:

• image formation means for forming an image;
• density measurement means for measuring a density of an image formed by said image formation means;
• and
• control means for causing said image formation means to form a first image for measurement at a first processing speed, for causing said density measurement means to measure a density of the first image for measurement, and for determining both a first image formation condition for said first processing speed and a second image formation condition for a second processing speed different from said first processing speed, on the basis of the density obtained by measuring the first image for measurement.

A control method for an image formation apparatus which has a function to make processing speed for image formation changeable, said method comprising:

• an image formation step of forming a first image for measurement at a first processing speed;
• a measurement step of measuring a density of the first image for measurement;
• and
• a determination step of determining both a first image formation condition for said first processing speed and a second image formation condition for said second processing speed different from said first processing speed, on the basis of the density obtained by measuring the first image for measurement in said measurement step.