Method for setting conditions in photographic printing

Claim 1

A method for setting conditions in a photographic printing system in which an exposure amount for a photographic paper is controlled by inserting and removing color compensation filters in a photographic printing light path, which comprises the steps of: measuring a light amount with a photosensor by inserting and removing the color compensation filters from the light path; calculating a correction amount D 1 for light source variations in comparison with a reference value on the basis of the light amount measurement; calculating a control amount D 2 needed to effect a desired density for a photographic paper on the basis of a difference value determined from a previously stored standard negative film density U and the calculated correction amount D 1 ; storing the correction amount D 1 and the control amount D 2 ; respectively changing the standard negative film density U, the correction amounts D 1 and the control amount D 2 in accordance with respective detected variations thereof; and controlling the inserting and removing of the color compensation filters so that an amount of light corresponding to an exposure reference value which impinges on the photographic paper is equal to an exposure reference value which is obtained by combining the difference value and the control amount D 2 .

Claim 2

A method for setting conditions in a photographic printing system in which an exposure amount for a photographic paper is controlled by inserting and removing color compensation filters in a photographic printing light path, which comprises the steps of: measuring a light amount with a photosensor by inserting and removing the color compensation filters from the light path; calculating a correction amount D 1 for light source variations in comparison with a reference value on the basis of the light amount measurement; calculating a control amount D 2 needed to effect a desired density for a photographic paper on the basis of a difference value determined from a previously stored standard negative film density U and the calculated correction amount D 1 ; storing the correction amount D 1 and the control amount D 2 ; respectively changing the standard negative film density U, the correction amounts D 1 and the control amount D 2 in accordance with respective detected variations thereof; and controlling the inserting and removing of the color compensation filters so that an amount of light corresponding to an exposure reference value which impinges on the photographic paper is equal to an exposure reference value which is obtained by combining the difference value and the control amount D 2 .

Claim 4

A method for setting conditions in a photographic printing system in which an exposure amount for a photographic paper is controlled by inserting and removing color compensation filters in a photographic light path, which comprises the steps of: calculating an exposure correction value D 2 necessary to print on the photographic paper with a desired density; based on a negative film density which is an average density of a large number of negative films, and based on the correction value D 2 , inserting and removing color compensation filters; and exposing the photographic paper using the color compensation filters.

Claim 5

A method for setting conditions in a photographic printing system in which an exposure amount for a photographic paper is controlled by inserting and removing color compensation filters in a photographic light path, which comprises the steps of: calculating an exposure correction value D 2 necessary to print on the photographic paper with a desired density; based on a negative film density which is an average density of a large number of negative films, and based on the correction value D 2 , inserting and removing color compensation filters; and exposing the photographic paper using the color compensation filters.

Claim 6

A method for setting conditions in a photographic printing system in which an exposure amount for a photographic paper is controlled by means of inserting and removing color compensation filters in a photographic light path, which comprises the steps of: controlling the inserting and removing of the color compensation filters according to: a correction amount D 1 corresponding to a light source variations with respect to a reference value which is detected by photosensors, and a control amount D 2 needed to make a desired density for the photographic paper, and a standard negative film density U; comparing the standard negative film density U with a density of a negative film to be printed and calculating a modified exposure amount in response thereto; controlling and inserting time of cut filters in the light path according to said modified exposure amount so as to thereby change the effective exposure time.

Claim 7

A method for setting conditions in a photographic printing system in which an exposure amount for a photographic paper is controlled by means of inserting and removing color compensation filters in a photographic light path, which comprises the steps of: controlling the inserting and removing of the color compensation filters according to: a correction amount D 1 corresponding to a light source variations with respect to a reference value which is detected by photosensors, and a control amount D 2 needed to make a desired density for the photographic paper, and a standard negative film density U; comparing the standard negative film density U with a density of a negative film to be printed and calculating a modified exposure amount in response thereto; controlling and inserting time of cut filters in the light path according to said modified exposure amount so as to thereby change the effective exposure time.