JPS58202445A - Method for managing developing solution of photographic film and control strip used for execution of said method - Google Patents

Abstract

PURPOSE:To manage a developing soln. correctly, by developing a control strip given patterns different in line density, and measuring average photographic density at the part of a prescribed line density. CONSTITUTION:Plural inclined lines 2 each have a prescribed width and the same interval as the width between the two adjacent lines and both widths and intervals gradually become thinner as they go farther in the right direction, with the widths and intervals maintained equal to each other. The lines 2 are exposed to the same intensity light. In the graph, numerals on the horizontal axis (vertical on this paper) express the densities of the inclined lines 2 shown above, or resolution (number of lines/mm.<2>). When the control strip is developed in prescribed conditions, each fog 3 produced on both side of each line 2 is equal in the extent of fog, but as the density of the lines 2 become higher, discrimination of the two adjacent lines 2 becomes impossible, and average photographic density rises. The developing soln. can be correctly managed by measuring the discrimination limit of the lines 2 or the average photographic density at the prescribed position, and obtaining this result digially by the numerals in the control strip 1.

Description

[Detailed Description of the Invention] Conventionally, developing solutions for photographic film have been managed using a control strip that gives a predetermined exposure that changes stepwise.Development processing is carried out under predetermined conditions, and the blackening density is measured using a densitometer. I was walking there.

However, this method requires a density measuring device and is cumbersome, and the image resolution quality cannot be controlled due to the non-uniformity of the blackened area due to the difference in size of reduced silver particles depending on the composition of the developer. It was difficult to do so.

In the present invention, a control strip that has been exposed to constant exposure with different linear densities and patterns is developed under predetermined conditions, and the average density at a location with a predetermined linear density is measured, or the resolution discrimination limit between adjacent lines is determined. A method of controlling developer activity and resolution quality by observing or measuring;
BRIEF DESCRIPTION OF THE DRAWINGS The control strip used to carry out this method will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the first part of the control strip according to the invention.
This control strip (1
1, while maintaining the exposed and non-exposed areas at equal intervals,
A plurality of diagonals i (2) of a predetermined width, whose intervals gradually become narrower toward the right in the figure, are exposed on a predetermined same-first-come, first-served basis, and the numbers indicate the density or resolution of the diagonal line (2) directly above (2). Book/-
).

When the control strip (1) described above is developed under predetermined conditions, as shown in FIGS. 2 and 6, even if the degree of each fog (3) occurring on both sides of the diagonal line (2) is the same, As the density of diagonal lines increases, the fog (3) makes it impossible to separate and identify the diagonal lines (2), and the average density increases.

Furthermore, as shown in Figures 3 and 4, even if the density of the diagonal lines is the same, if the activity of the developer is excessive or the reduced silver particles are coarse, the diagonal lines (2 ) will become impossible to identify and the average concentration will increase. Therefore, measure the decomposition identification limit indicated by the diagonal line (2) or the average concentration at a predetermined location and control the results)
By knowing the numbers in the IJ tube (1) numerically, it is possible to properly manage the developer.

Since the special VC decomposition identification limit can be easily determined with the naked eye, it is extremely convenient to apply to rapid processing development, etc., where the management of the developer solution does not need to be very strict.

Furthermore, the method of the present invention is highly effective when applied to the management of film developer in a don't-generator type direct scanner that requires a fine resolution discrimination limit. Furthermore, even if the control strip Il+ is used in conjunction with a conventional control strip given a predetermined exposure,
Many effects can be expected.

In the above example, a predetermined exposure was performed, but
Control strips with patterned gold arranged in parallel with several types of exposure ti can also be used.Also, although we have explained that the exposed areas are evenly spaced and the non-exposed areas, this also applies even if the patterns are unevenly spaced. What is the purpose of Stritz°?

FIG. 5 shows a second embodiment of the control strip of the present invention, in which the control strip (4) has a plurality of parallel, equally spaced, A group of parallel lines (5) of different widths are exposed with the same predetermined amount of light so that the distance between the parallel lines (5) becomes narrower towards the right side of the figure.The numbers indicate the parallel lines (5) directly above. )
represents the density or resolution of

This control strip (4) is also used in the same manner as the control strip (1) in the first embodiment,
It has a similar effect.

In addition, this control strip (4) has parallel lines (5
) are provided facing in two directions at right angles to each other, so
Accidents such as abnormal flow after development can also be discovered from the difference in decomposition discrimination limit or average density shown by the parallel lines (5) in both directions after development.

[Brief explanation of the drawing]

FIG. 1 is a front view of a first embodiment of the control strip of the present invention; FIG. 2 is an enlarged longitudinal sectional front view showing the blackening density of a portion with rough linear density in a control strip with a large amount of fog after development processing; Figure 5 is an enlarged vertical cross-sectional front view showing the blackening density of the thin line density area, and Figure 4 is the fog control after development processing.
FIG. 5 is an enlarged longitudinal sectional front view showing the blackening density of the thin line density part of the IJ knob.
l) A front view of the second embodiment of the tuzo. (1) Control strip 7” (2) Diagonal m (3) Turnover (4) Control strip (5) Parallel line procedure amendment (Own ship February 22, 1980 Commissioner of the Japan Patent Office Kazuo Wakamatsu 1. Indication of the incident: Patent Application No. 5785 of 1982 2.
Title of the invention A method for managing a developer for photographic film and a control strip 3 used in carrying out the method; Relationship with the person making the amendment Patent applicant name Dainippon Screen Mfg. Co., Ltd. 4, Agent 5, Ordering the amendment date spontaneous

Claims (1)

[Claims] (11) A photograph characterized in that a control strip to which latent images of patterns with different linear densities are applied is subjected to a development process, the average density of a portion of a predetermined linear density is measured, and the results are managed. A method for managing film developer. (2) Developing a control strip with latent images of patterns with different linear densities, observing or measuring the resolution discrimination limit between adjacent lines, and managing based on the results. A method for managing a developing solution for a photographic film characterized by: (3) A control strip characterized by exposing a photographic film to a pattern with a continuous or stepwise varying linear density at a predetermined amount of light to impart a latent image. .