JPS58203441A - Blackening compensation method using testing piece in automatic developing machine - Google Patents

Abstract

PURPOSE:To compensate mechanically the activity of a developer accurately and quickly, by supplying a supplementary liquid to the developer to be compensated or allowing an exposed disused film to pass in the developer on a basis of a value obtained by multiplying the difference between a standard density and a measured density by an experimentally obtained coefficient. CONSTITUTION:When the first gate 15 is opened, the first multiplying circuit 10 is started by the signal passing through this gate 15, and a density difference (N-N') inputted from a subtracting circuit 14 and the first blackening coefficient K1 inputted from the first blackening coefficient setter 7 are used to perform the operation of an expression T=K1X(N-N'). A constant flow rate solenoid valve 19 is opened during the time T to supply a required quantity of a blackening compensating liquid, and the developer is restored to a prescribed activity. When the second gate 16 is opened, the second multiplying circuit 11 is started by a signal passing through this gate 16, and the density difference (N-N') inputted from the subtracting circuit 14 and the second blackening coefficient K2 inputted from the second blackening coefficient setter 8 are used to perform the operation of an expression A=K2X(N-N'). The result is displayed as an area value A on a display 21 through a decoder, and the exposed film is allowed to pass in the developer in accordance with this value to restore the developer to a prescribed activity.

Description

[Detailed Description of the Invention] In order to maintain the activity of the developer at a predetermined value in an automatic film processing machine, and to restore the activity that has decreased due to blackening of the processed film, (a) a constant flow pump is required. (b) Actual blackness of processed film by operating a constant flow solenoid valve for a certain period of time to replenish heat-resistant liquid that corresponds to the development processing area of the film and the blackening rate assumed in advance. (C) A method of replenishing the anti-blackening replenisher corresponding to the area of the film being processed. A method of replenishing an anti-blackening replenisher for a corresponding period of time is known.

Well, the developing solution is also fatigued by oxidation, and the degree of fatigue differs depending on whether the automatic developing machine is in operation or not. Therefore, the amount of replenishment per unit of operating time and unit of rest is changed, and the amount of replenishment per unit of operating time and unit of rest is changed. It is necessary to replenish an anti-oxidant replenisher in an amount proportional to each.

However, if the above-mentioned correction control is applied once, errors in control accuracy will accumulate, so it is necessary to further correct the development # according to the results of passing the test piece through the test piece twice a day.

Regarding the correction management based on this test, in the past, the blackening correction was carried out by developing a test piece with a predetermined density of light using a standard developer, and measuring it visually or once using a meter. Compare the known standard linearity with the density of a test piece of the same type as above, developed with the developer to be corrected, and visually or measured with a densitometer, and calculate the amount of blackening corresponding to the humidity difference. This was done by replenishing the replenishing fluid based on the experience and skill of experts. In addition, when over-replenishment occurs, the activity of the developer is lowered by a required amount by passing exposed unused film.

However, with this method, it is difficult to determine the exact amount of replenisher that corresponds to the difference in concentration between the two test strips, so it is common practice to manually replenish the fluid a little, pass it through the test strip, and then fill in the remaining amount. If over-replenishment occurs, the exposed unused film is tested and rotated several times to the standard condition. Therefore, the work is very troublesome,
And it takes time.

The present invention relates to a method for mechanically, accurately and quickly performing the blackening correction on the above-mentioned test piece.To summarize, as illustrated in FIG. (
Continuous tone zone (1) when processed with standard developer
2) Alternatively, place the measurement point (4) at a suitable location in the mesh zone (3), for example, 50% of the mesh zone (3), using a boat speedometer (5
) is the standard concentration measured with N, and the same type of test piece (1
) is treated with the developer to be corrected, the above measurement point (
Using the same concentration measured in the same manner as in 4) as N', apply the anti-blackening replenisher automatically according to the following formula (1) according to the instructions from the computer. IfI] replenish, or
The exposed and unnecessary film is passed through according to the following formula (2).

T=to, x CN-N')・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・(1)A
= −, x (,N−N)・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・(2) T is the time during which the constant flow liquid replenishment means is operated.

A is the area of exposed unused film.

K is a blackening coefficient determined experimentally in advance based on the test piece, developer, and replenisher used, the concentration measurement position of the test piece, the flow rate of the replenishing solenoid valve, the type of waste film, etc.

Note that the density measurement location may be a location corresponding to the measurement point (4) in the continuous tone zone (2).

FIG. 2 shows an example of a block diagram for implementing the present invention, and the present invention will be specifically explained below based on FIG. 2.

In advance, set the standard limit N, the first blackening coefficient, and the second blackening coefficient to 2, respectively, using the standard density setter (6), the first blackening coefficient setter (7), and the second blackening coefficient. Set it in the coefficient setter (8).

1. If the difference between the standard density N and the measured density is small and the difference is within the allowable range, the control width P is set in advance in the control width setting device (9).

Furthermore, the above equations (1) and 2) are stored in the first multiplication circuit (1) and the second multiplication circuit (11), respectively.

When the above-mentioned measured density Ni measured by the densitometer (5) is set in the measurement variation setter 12) and the circuit is started, the set image density N and N are both determined by the excess/deficiency discrimination circuit (1B).
is input to the subtraction circuit 04).

Then, in the excess/deficiency discrimination circuit (1B), both enrichment N1
The magnitude of N, that is, whether the developer is under-replenished or over-replenished, is determined, and the first and second signals are respectively output as positive and negative signals.
The signal is output to the gate (b)) and the second gate (16), and the concentration difference (N-N) is calculated in the subtraction circuit Q→. The results are input to both multiplication circuits (io) (11) and comparison circuits 0!7).

The comparison circuit (17) compares the value (N-N) with the management width P input from the management width setting device (9), and calculates Pm a.
〉(If it is within NIig P, the lamp 08) is lit to notify, and if (N-N')>P□881, that is, the developer is insufficiently replenished by more than the management width P, the first game) ( +5
) is opened, and (N-N) <P step, that is, if the developer is over-replenished beyond the control width P, the second gate α6) is opened.

When the first gate α5) opens, the passing signal causes the first gate α5) to open.
The multiplication circuit (10) is started, and the above ( 1) Formula T-
Then, the calculation xCN-N) is performed. During this time T, the constant flow solenoid valve (19) is opened to replenish the required amount of anti-blackening solution and restore the developer to a constant level of activity.

2nd game) When (16) opens, the passing signal causes
The second multiplication circuit 01) is activated, and the density difference (N-N) input from the subtraction circuit (14) and the second blackening coefficient setter (8)
By inputting the second blackening agent d K2, the above (2)
An operation of x (N-N) is performed on equation A--. The result is sent to the tactile device (21) via the decoder (goods)).
Since the area value A is displayed as the area value A, if the exposed film is passed through the developer according to the area value, the developer can be made to have a predetermined activity level.

As described above, according to the method of the present invention, all darkening correction can be performed mechanically. Therefore, even an unskilled person can quickly and accurately correct the blackening of the developer with one simple operation, which is extremely convenient and improves the operating rate of the automatic processor. can be done.

Next, a test piece detection device such as a microswitch, a film conveyance pause device activated by the detection device, and a densitometer (5) are installed at the outlet of the dryer for automatic development. ) may be automatically measured and inputted.Alternatively, six lengths of the developed test piece (1) may be manually measured at appropriate locations and inputted.

In addition, in the above explanation, the middle concentration point on the test piece (1) was defined as the concentration measurement point (4), but this is because the concentration can be measured relatively easily and accurately at the same point. However, another location, for example, a location with 75% halftone dots may be used as the density measurement point.

It goes without saying that in place of the constant flow rate '-electromagnetic valve 1.9), any suitable constant flow replenishment means, such as a constant flow pump, can be used.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a test piece, and FIG. 2 is an example of a block diagram for implementing the present invention. (1) Test piece (2) Continuous tone zone (3)
Mesh zone (4) Measuring point (5) - Change of course
(6) Standard density setting device (7) First blackening coefficient setting device
(8) Second blackening coefficient setter (9) Management width setter (
10) First multiplication circuit (11) Second multiplication circuit (]2
) Measuring humidity setting device (18) Excess/deficiency judgment circuit (14)
Subtraction circuit (b) 1st gate) (16) 2nd gate 07) Comparison circuit (+8) lamp r19)
Solenoid valve (2o) Decoder (21) Display

Claims (6)

[Claims] (1) The standard concentration at a predetermined measurement point on a test piece treated with a standard developer, and the measured concentration at the same point as the above measurement point on a test piece of the same type as above, treated with a developer to be corrected. The activity is corrected by replenishing the developer to be corrected with a replenisher, or by passing exposed unused film, based on the value obtained by multiplying the concentration difference by the experimentally determined 1. A blackening correction force method using a test piece in an automatic processor, which is characterized by: (2) The method according to claim 1, characterized in that the experimentally determined coefficient is related to the operating time of the constant flow replenishment means for replenishing fluid. (3) The method according to claim (1), wherein the experimentally determined coefficient is related to the area of exposed unused film. (4) Claims (1) to (1) above, characterized in that the activity level is corrected when the concentration difference between the standard level and the measured level falls outside a predetermined allowable control range. (3)
The method described in any of the paragraphs. (5) The method according to claim (4), characterized in that the replenisher is replenished when the concentration difference between the standard concentration and the measured concentration falls outside a predetermined allowable control range. (6) Claim (4) characterized in that when the density difference between the standard density and the measured penetration falls outside a predetermined allowable control range, the exposed unused film is passed through a developer. the method of.