JPS58214158A - Device for calculating etching condition in gravure plate making - Google Patents

Abstract

PURPOSE:To calculate the optimum etching conditions before the etching, by dropping an testing soln. on the part of a resist to be tested to measure permeability characteristics. CONSTITUTION:A testing gradation scale 3 consisting of A, B, C, D from shadow to highlight is formed on the resist 1 in intimate contact with the surface 2 of copper of a cylindrical plate material. An electrically conductive testing soln. consisting essentially of polyol is dropped, and the etching conditions of the variable rotation speed-single soln. type etching method is calculated with a main computer comprising a measuring tool 100 for measuring the total time of the testing soln. dropping, permeating, changing resistance, and short-circuiting, a circuit connected through a lead wire 110 to the tool 100 for measuring the measured signal, a main operation input part, a memory, an operation processing part, and an output part. The permeation time of each gradation scale, that of each cylinder rotation speed, etc. are used as the based data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to corrosion technology for gravure plate making, and in particular, to corrode gravure printing plates using the variable rotation speed molding corrosion method. This invention relates to a device for calculating corrosion conditions.

In gravure plate making, the so-called one-liquid, one-pot method is said to be superior in terms of corrosion process control. This is an attempt to obtain a desired cell depth curve by supplying a corrosive liquid consisting of a ferric chloride solution at a constant concentration to the cylinder surface and varying the cylinder rotational speed. In the conventional method, the cell depth at two points, the most shadow part and another desired part, of the corroding gravure printing plate is detected in one step, and the cell depth at the desired depth part is set to an intermediate setting value. Each time they match, the depth of the deepest shadow is measured, and if the depth is greater than a predetermined value, the rotational speed is decreased, and if it is smaller, the rotational speed is increased to adjust the amount of corrosion.

However, since only two cell depths are controlled, it cannot be detected whether the cell depth of the halftone portion matches the cell depth curve of the f'9r period until the corrosion is completed.

Furthermore, since the conventional method described above is basically feedback control, it requires a cell depth or volume detection sensor and an arithmetic control device, and has the disadvantage that it makes the corrosive machine very complicated and complicated.

The present invention has been made to solve the above-mentioned drawbacks, and involves dropping a test liquid that has a correlation with a corrosive liquid with respect to the penetration characteristics of a gravure printing plate resist onto the portion to be inspected of the resist on the cylinder surface, and applying this test liquid to the resist. By measuring the penetration characteristics of the metal using the electrical resistance method and comparing the measurement results with basic data obtained in advance, the corrosion conditions for the variable rotation speed liquid type tile eating method can be calculated, and the data can be input for the next corrosion process. This device is characterized in that it can be used as a device.

The basic data to be obtained in advance here is the relationship between the test liquid penetration time and the corrosive liquid penetration time at each stage of the M142 cool of the test gradation resist, and the test liquid penetration time and copper surface for each cylinder rotation speed. There is a relationship with the corrosion rate (corrosion amount per unit actual corrosion time), and these are stored in a memory circuit as a table or approximate function equation. Then, compare the data obtained by measuring the penetration time of each part of the gradation scale of the gravure printing plate resist to be used for printing with the same test liquid, the set cell depth of each part of the gradation scale, and the data in the above memory circuit to determine the Optimal corrosion conditions suitable for the /i property of the resist, that is, W corrosion time, corrosion distribution time, and rotation speed are calculated by arithmetic processing.

This makes it possible to preset control the corrosion conditions themselves, which was previously impossible, and as a result, the striped eating machine itself can be made of a simple steel plate, providing a very inexpensive and stable corrosion system.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the overall appearance of the apparatus according to the present invention. In the figure, the gravure plate material is cylindrical, and 1 is the plate material that is in close contact with the copper layer surface 2 of the plate material. It is a resist. An image to be printed has been printed and developed on the resist 1, and a gradation scale 3 for inspection, for example, gradation areas A, B, and CSD from shadow to highlight, are also formed. This device includes a measuring section tool 100 for dropping a test liquid in the gradation scale section and grasping its permeation characteristics, and a lead wire 1 for this tool and a measuring section tool 100.
It consists of an apparatus main body 200 for calculating corrosion conditions through arithmetic processing and a stand 300 that can accommodate tools, which are connected to each other via a cable 10, and a stand 300 that can accommodate a tool. Calculate the corrosion conditions for the variable rotation speed-wave corrosion method from the relationship with the set corrosion amount.

Each element constituting the apparatus shown in FIG. 1 will be explained separately.

First, a measurement unit tool 100 for testing the penetration characteristics of a resist of a gravure plate material using a test liquid will be described. Here, the test liquid is, for example, a conductive solution mainly composed of polyhydric alcohol, and is non-corrosive or slightly corrosive.
A sacrificial solution is used that has a certain correlation in penetration characteristics with respect to an embalming solution consisting of a ferric chloride solution and has excellent reproducibility.

FIG. 2 shows an example of the configuration of the measurement section tool 100. In the figure, the measurement section tool 100 has a cushioning material 120 such as rubber or plastic film on the bottom surface for protecting the gravure printing plate resist 1. The magnet 121 disposed on the upper surface of the cylinder 2 is fixed by an attractive force generated between the cylinder 2 and the magnetic base material. The magnet is clamped in a so-called one-touch manner by a handle 122 above the tool.

This clamp may be omitted if the tool is to be made more compact. In addition, when fixing to a cylindrical object, a slight indentation may be made in the bottom surface to further stabilize the adhesion. There is also a hand control section above the tool, clear key 125
, an X key 12d for inputting a display value of test liquid penetration time is provided, and is connected to an apparatus main body 200, which will be described later, via a lead wire 110.

The inspection method uses resist electrodes 130 which are provided on the gradation scale 3, which is the part to be inspected of the resist, so as to be brought into contact with the test liquid and are protected by electrode guides 123.
After positioning the test liquid 131 and fixing the measuring tool by magnetic force, fit the body of the test liquid dedicated tube 140 into the guide 132 for guiding the dropping of the test liquid SL, and apply the test liquid SL from the injection port onto the resist. Resist electrode 130
and 131 position as shown in FIG. Dripping amount is 1o
A small amount of less than 0 μl is sufficient, but it is necessary to drop a certain amount at a time.

To explain the inspection principle of penetration characteristics, the so-called resist is regarded as an electrical resistor, and when the test liquid penetrates into the resist, the resistance change between the copper surface of the gravure printing plate and the test liquid, that is, the difference between the two. A short circuit is formed between the two, and the test is performed based on the time required from the drop of the test liquid to the short circuit.

FIG. 3 shows an example of the usage state of the measuring tool. As shown in the figure, one short circuit is caused by the resist 1 being in close contact with the resist electrode 130° 131 onto which the test liquid SL is dropped. The test liquid SL of the resist is formed between the copper layer 2 and the cylinder electrode 133 that is grounded, and the test liquid SL of the resist is The inspection is performed by counting the penetration time. Note that the clear key 125 in FIG. 2 is pressed when you want to erase the displayed value of penetration time, and the input instruction A similar key is also provided in the main operation input section of the main body 200 of the apparatus. Also, it may be possible to separate the cylinder electrode 133 from the measuring tool and devise a method so that the copper layer of the gravure plate material can be brought into direct contact with the iron plate.

FIG. 4 shows the main body 200 of the device, which is connected to the measuring tool through a lead wire, and has the function of calculating and outputting the optimum corrosion conditions for the one-component corrosion method, which is the core of the present invention. The device configuration includes a measurement circuit section that counts the permeation time of the test liquid SL in the measurement section tool mentioned above, as well as a display section, an operation main input section, an arithmetic processing section,
It consists of a memory circuit section and an output section, and is housed in an integrated case as shown. FIG. 5 shows a block diagram of the main body of the apparatus including the measurement tool.

The detailed configuration of the main body of the apparatus will be explained with reference to FIGS. 4 and 5.

The device configuration includes a clock 152 that is directly connected to the measurement tool by a lead wire 110 and that oscillates pulses, a counter 153 that performs a counting operation, its interface 154, a CPU (microprocessor) 250, a display section 210 and its interface 211, Numeric keypad 202, ALLCLEAR key 203, and X key 204 as operation input units
, Y key 205, J b, e key 206.5 TART key 207, RAM key 209 and key scanner 20
8 and memory circuit section/closed random access memory R
A M 251, a non-volatile RAM 220, a read-only memory ROM 230, a magnetic card output device 260 (card writer) for writing arithmetic processing results onto a magnetic card and its interface 261, and a printer 240 for printing out and its interface 241. CPU 250, input section 154.208
, output section 211.241.261, storage section 221°23
0 and 251 are mutually connected to the data bus and address node (252).
are combined with.

Regarding such a configuration, the measurement circuit will be explained first. This apparatus becomes ready for measurement operation by turning on the power switch 201, but in this case, since the resist electrode 131 is grounded via the resistor R2, its potential vB is 2° at the time point in FIG. 6(A). -21, which is 0 [v], which is lower than the threshold potential (+vTH). Therefore, the output of the comparator 150 is a binary signal °IO'' (see FIG. 6(B)), and the clock pulse C of a predetermined frequency inputted from the clock 152.
Since P is blocked by the AND circuit 151, the counter 153
does not count.

Next, when the conductive test liquid SL is dropped onto the resist electrodes 130 and 131 on the resist 1 using the dropper 140, the test liquid SL is conductive and the resist 1
and the resist electrodes 130 and 131, so that from the point of dropping z1, the current from the power supply (+Voo) flows through the resistor R1 and into the resistor R2 and the resist, that is, in terms of the circuit, the resistor R3. Therefore, the potential VB becomes the divided voltage value (VM) of the combined resistance value of the resistor R1 and the resistors R2 and R3 (
Referring to FIG. 6(A), this is input to the comparator 150. This partial pressure value is the threshold potential (+vTH
), the output CM of the comparator 150 is 2.
The value signal becomes 111 T9 (see FIG. 6(B)), and the clock pulse CP passes through the AND circuit 151 and is input to the counter 153, and counting operation is started. After this, the test liquid SL registers) IK gradually increases. As it penetrates, the potential VB
gradually decreases, and at time z2 the threshold potential ■TH
When the value becomes smaller, the output CM of the comparator 150 becomes 0 again, the pulse CP from the clock 152 is cut off by the AND circuit 151, and the counting operation of the counter 153 is stopped. The counter 153 counts the pulses CP from when the test liquid SL is dropped until the test liquid SL penetrates to a predetermined depth (corresponding to the value of threshold potential v, 1). The penetration time (seconds) is displayed on the display section 210 via the display interface 211 at the same time as the data is converted into time data by the CPU 250 and transmitted to the FAM 251 via the data bus.

If there is no particular problem with the penetration time displayed on the display section 210, use the manual instruction X key 126 on the hand operation section above the measuring tool 100 or the input instruction is pressed, and the data is stored in the RAM 251 as corrosion condition calculation data. After that, the counted value of the counter 153 and the displayed value of the display section 210 are cleared by pressing the clear key 125 on the hand operation section or the clear key on the numeric keypad part 202 of the main operation input section, and the above-mentioned penetration is cleared. Time measurements are sequentially performed for each stage of A, B, C, and D on the gradation scale 3, and all are taken into the RAM 251 as data for calculating corrosion conditions.

Here, the display unit 210 displays the number of seconds of the above-mentioned test liquid penetration time, and displays the gradation scale portions A and 13 of the resist 1.
, C, and D are displayed in microns. In addition to having a so-called visual check function for input data,
It also has a function to display "YES" or "NO" as to whether or not corrosion can progress under the corrosion conditions finally calculated through arithmetic processing.

That is, it also has a function that allows you to check out in advance whether the state of the resist is capable of controlling single-liquid corrosion at a predetermined concentration. The display is performed to the first decimal place using a liquid crystal or a photoelectric element. Note that the display may be devised so that the input data slides horizontally one after another so that each input data can be visually confirmed at the same time.

Further, regarding the aforementioned cell setting depth (micron value), if the correlation between the cell depth and the cell volume (volume) is separately recorded, the cell volume, for example, the CC value, may be displayed. In short, it is sufficient if the cell setting corrosion speed can be displayed.

Next, the main operation input section is a main power switch 201 and an ALL CLEAR key 203 that instructs standby preparation for data input.
The keypad part 202 allows you to manually set the test liquid penetration time, cell setting depth, etc., and also the test liquid penetration time of each part A, BSC, and D of the resist scale mentioned earlier.
an X key 204 for storing an input instruction at a predetermined address of 51;
A, B, and C corresponding to that.

RAM
Y key 20 to store the input instruction at a predetermined address of 251
5 and IIJi meal setting curve instruction keys a, b, C2
06, 5TART key 207 to start arithmetic processing and output instructions, a, b, 'c keys 206 to set corrosion setting curve
A RAM key 209 is stored in a predetermined address of a non-volatile RAM 220 corresponding to the RAM key 209.

The detailed operation input method for each key will be described in the operation explanation using the flowchart described below, but the corrosion setting curve instruction keys a, b, c 206 are used to select the cell setting depth for each part of the resist scale of a typical corrosion curve, for example, A, BXCSD. are stored in non-volatile RAM, etc., as necessary, and can be selected with a one-touch key operation.

The number of b and c keys is arbitrary and does not need to be used.

Note that if the a, b, and c keys are not used, the cell setting depth is input using the numeric keypad and the Y key.

In addition to RAM 251, the memory circuit section includes the above-mentioned non-volatile R.
It consists of AM 220 and ROM 230. Examples of non-volatile RAM include N1tron and NC.
7055 etc., set the above-mentioned corrosion setting curve, turn on the RAM switch 209, and press each key 20 of a, b, and c.
For example, the address K of the nonvolatile RAM corresponding to number 6 can be stored by using the numeric keypad and the Y key.

The ROM 230 contains test data for comparing penetration times between a corrosive liquid of a predetermined concentration and a test liquid (see Fig. 7), which will be necessary for the calculation processing described later, as well as a large number of gradation scales for each stage of the resist at various cylinder rotation speeds. A large number of relationship test data (see FIG. 8) between the penetration time of the test liquid and the corrosion rate of the copper surface of the corrosive liquid are stored in the lid 231 in a compatible format.

If the corrosive liquid has the same concentration, it is versatile, so you can create a ROM for each concentration, and when using a corrosive liquid with a different concentration, you can replace it as appropriate, or store two or more types of ROM in advance and switch. You may use different ROM memories that match the concentration of the corrosive liquid used in the switch. however,
In that case, two or more types of etchants are prepared in tanks, and only one etchant with a predetermined concentration suitable for the resist to be corroded is selected. Furthermore, even when the corrosion conditions of several or more corrosive machines are managed in a group using this apparatus, it is sufficient to store a ROM corresponding to the characteristics of each corrosive machine, and the functions of the apparatus can be further improved.

As a method of storing each test data in the ROM 230, for example, each test data can be expressed using an approximate function equation such as t:axb in FIG.

b may be a constant determined for each corrosive liquid of a predetermined concentration), or X may be a data table in 0.5 second increments and the corrosive liquid penetration time t may be stored in memory. For each copper surface corrosion rate Δy for each cylinder rotation speed in Fig. 8, the test liquid penetration time X is set to 0.5 seconds,
It may also be stored in memory as a data table.

CPU section 250 and output section 240, 260 that perform arithmetic processing
This will be explained in detail with reference to chart 7o in FIG. 9, which describes the operating procedure.

Without switching, turn on the power switch 201 (at this time, the power lamp 280 lights up) and press the ALL CLEAR key 203.
When is pressed (step 81), standby preparation for data input is instructed. Therefore, the measuring section tool 100 is set on the gradation scale section 3 on the resist 1, and the test liquid penetration time X at each predetermined scale stage ASB and CSD is checked one after another (step 821). 210 and are read into the KRAM 251 one after another by pressing the X key 204 (S 7' S3)
. Subsequently, the cell setting depth value y corresponding to each scale stage BXC and DK can also be set directly using the numeric keypad 202 or by pressing the cell setting curve key a.

b, c 206 to select from the non-volatile RAM 220 and display it digitally on the display unit 210 (Step 84);
If there is no problem, use the Y key 205 to set the cell setting depth to RA.
M 251 (step 85). In this case, always decide whether to input data in order from the shadow side or from the highlight side, and be sure to make sure that the test liquid penetration time X key manual value and cell setting depth Y key manual value correspond to each other. Enter as follows. Therefore, in some cases, X and Y may be input while being associated with each other alternately.

When the above key inputs are completed, press the 5TART key 207 and the calculation process will be performed according to a certain calculation procedure programmed into the CPU section 250 (step S68).For example, the total corrosion time and corrosion The allocated time and rotation speed are output to the output printer 240 and the magnetic card output device 260 (step S7J).

An example of the one-component corrosion method for gravure printing plates will be shown regarding the calculation procedure of this calculation process.

Figure 11 depicts the relationship between the input test liquid penetration times XA, XB-, Xc-, Xp for each gradation portion ASBSC,D and the set cell depth) It is what it is. That is, if corrosion is performed under corrosion conditions that satisfy the four plot points ASB and CSD in FIG. 11, a cell depth curve as set can be obtained.

First, estimate the point p where the penetration characteristic curve tone in Fig. 11 intersects with the X axis, that is, the point p where the cell depth y = Q, find the test solution penetration time X at that point, and calculate the test solution penetration time X at that point. The corrosive liquid permeation time amount corresponding to the amount of time is determined from the stored ROM 230 as illustrated in FIG. 7, and this is determined as the total corrosion time.

Of course, the point p may be determined by actually measuring the resist portion where y=0 should be set for the test liquid penetration time X, or the straight line connecting the two points It may also be calculated as a point that intersects the axis. Furthermore, it can also be calculated as the point where the tangent to the curve XDS'D intersects the X axis.

Once the total corrosion time t is determined in this way, the two points B and C, which are intermediate tones, are determined from the beginning as the branching points of the corrosion conditions, and the corrosion work is started at the first point from the start to point B. period, second period from point B to point C, corrosion end point p-
The corrosion distribution time and cylinder rotational speed for each period are calculated by dividing the period into a total of three periods'. In this case, any intermediate point can be arbitrarily selected as long as it is one or more points, but in any case, the corrosion conditions are divided at that point.

Now, the corrosion distribution time for each period is the corrosion liquid penetration time 'B%'C corresponding to the test liquid penetration time XB%XC at the point B1 point C which is a branching point.
From OM 230, the corrosion distribution time for each period can be determined as follows.

1st period (from corrosion start to point B): 1B 2nd period (from point B to point C): 1cm1B total corrosion time
:t.

On the other hand, the cylinder rotation speed in each period is determined in the following steps, starting from the third corrosion period, going back to the second period, and working backwards from the first period.

First, to determine the cylinder rotation speed in the third period, the test liquid penetration time at point C is X. ROM 2, in which data such as the rotational speed of each cylinder and the corrosion rate Δy of the copper surface of the corrosive liquid are stored in a table as shown in Figure 8.
30, and the corrosion rate per unit actual corrosion time is
Actual corrosion time θ at point C. Calculate the corrosion cell depth for each cylinder rotation speed by multiplying by This value is compared with the set cell depth y at point C, and the cylinder rotation speed, for example, Ra, which shows the value closest to C is selected and determined as the cylinder 11 rotation speed in the third period. Corrosion time θ.

Corrosion penetration time t at point C from melting total corrosion time tP.

This is the time during which the corrosive liquid actually corrodes the copper surface after reaching the cylinder copper surface at point C, that is, the third period time tp-1o.

Next, when calculating the cylinder rotational speed ml in the second stage of corrosion,
This is schematically represented in Figure 2. In the figure, the dotted line part for Copper No. 2 is the corrosion cell depth due to the corrosion conditions of the first corrosion stage, the solid line part is the corrosion cell depth due to the corrosion conditions of the second corrosion stage, and the broken line part is the corrosion cell depth due to the corrosion conditions of the third corrosion stage. Each represents depth. In other words, as shown in the figure, the corrosion of the copper layer occurs in stages through three stages: the first corrosion stage, the second corrosion stage, and the third corrosion stage, but the depth of each corroded cell changes with each cylinder rotation. There is also a correlation with speed and actual corrosion time. Therefore, as shown in the figure, the first and second stages of corrosion, and the second
There is a boundary line between the period and the third period (
This produces dashed-dotted lines (a) and (b).

For example, in the resist part where the test liquid penetration time is longer than the boundary line (b), it is affected only by the cylinder rotation speed in the third stage of corrosion, and the test liquid penetration time is between the boundary line (b) and (a).
In the resist part between, the rotation speed of the second stage of deception and the third stage of corrosion
Both rotational speeds are influential. Furthermore, in the resist area where the test liquid penetration time is shorter than the boundary line (a), corrosion occurs first.
It is influenced by the rotation speed of the first period, the second period rotation speed, and the third period rotation speed. Therefore, the calculation method for the rotation speed in the second stage of corrosion is the cell depth (solid line part in Figure 12) obtained by subtracting the cell depth (dashed line part in Figure 12) due to the rotation speed Ra in the third corrosion stage from the set depth yB of the cell at point B. ) can be calculated by focusing on

First, the amount to be subtracted is the cylinder rotation speed Ra at the resist portion at point B and the actual corrosion time θ. The corrosion cell depth under the corrosion conditions of 12 can be found using FIG. 8.

That is, from FIG. 8, the copper surface v1 corrosion rate data Δy of the rotational speed Ra is determined at the test liquid penetration time XB at point B, and the actual corrosion time θ is determined. Calculate by multiplying.

Let us assume that the amount of subtraction in the resist section at point B is ΔyB
', and if the new point after subtracting this influence is B', the set cell depth yB' at that point B' is 7B.
'=7B-ΔyB'. Note that ΔyB' is the first
This shows the broken line at point B in Figure 2.

Now, to determine the cylinder rotational speed in the second period, as in the third period, for each cylinder rotational speed at the test liquid penetration time The corrosion cell depth for each cylinder rotation speed is calculated by multiplying the amount of corrosion per unit actual corrosion time by the second stage actual corrosion time θ3 at point B, and this value and the previously calculated set cell depth yB' =) 'B-ΔyB' is compared, and the cylinder rotation speed that shows the value closest to yB' is selected, and the second period cylinder rotation speed is determined to be, for example, Re.

The actual corrosion time θ8 here refers to the time during which the corrosive liquid actually corrodes the cylinder copper surface at point B, from when it reaches the cylinder copper surface at point B until it reaches the cylinder copper surface at point C (
tp tn) (tp tc), i.e. the time t of the second period. -1B.

Finally, when calculating the cylinder rotation speed in the first corrosion stage, the cell depth (cell depth It can be calculated by focusing on the cell depth (dotted line part in Figure 12) obtained by subtracting the cell depth (solid line part in Figure 12) due to the rotation speed Re in the second stage of corrosion (the broken line part in Figure 12).

This subtraction process is done from point A from figure 8 in the same way as in the second period.
First, the actual corrosion time θ is added to the copper surface corrosion rate data at the rotation speed Ra at the test liquid penetration time KA.

For example, calculate Δy' and subtract it from yA to find a new point A', and further multiply the actual corrosion time θ8 by the actual corrosion time θ8 to the copper surface corrosion rate data at rotational speed Re by -, and then calculate, for example, ΔyA.
By calculating ``, and subtracting this influence to obtain a new point A'', the set cell depth yA' at this point A'' can be calculated as H = yA - ΔyA' - ΔyA''. Note that Δ
yA' indicates the broken line part at point A in Fig. 12, and Δy
A'' indicates the solid line portion at point A in FIG.

Now, to determine the cylinder rotational speed in the first period, similarly to the second period, the corrosion rate Δy of the copper surface of the corrosive liquid for each cylinder rotational speed at the test liquid penetration time XA at point A is determined from Fig. 8, and this unit actual corrosion The corrosion cell depth for each cylinder rotation speed is calculated by multiplying the amount of corrosion per hour by the actual corrosion time θ9 of the first period at point A, and this value and the set cell depth calculated earlier yA# = yA - ΔyA'-ΔyA'', select the cylinder rotation speed that is closest to yA'', and determine the cylinder rotation speed of the first period as Rh, for example.

The actual corrosion time θ6 here is the time during which the corrosive liquid actually corrodes the cylinder order at point A, from when it reaches the cylinder steel surface at point A until it reaches the cylinder copper surface at point B (
1P-1A)-(1,-1B) That is, the corrosion time in the first period is 1B-1A, which is the time taken by the corrosive liquid to penetrate the resist portion at point A.

From the above, the cylinder rotation speed R is calculated as: 1st period (from corrosion start to point Bi): Rb 2nd period (from point B to point C): Re 3rd period (from point C to point P): Ra If the corrosion distribution time and cylinder rotation speed are used in order from the corrosion conditions of the first stage, corrosion will occur according to the set cell depth at each stage of the gradation scale ASBSCSD, and an ideal corrosion reproduction curve will be created. That's what you get.

The calculation procedure described in detail here is one example,
It is not limited to this algorithm. Corrosion conditions may be set with higher accuracy by converting the measured data into a function using a smooth approximation formula, for example, plotting points A1B and CSD using a polynomial cubic formula (spline approximation) for each section.

When the above arithmetic processing is completed in the 020 section 250 using appropriate memory data, the input data and output data are printed out on printing paper by the output section 240, for example, as shown in FIG. 1O. The input data is output in order to check for input errors, and the output data includes the total corrosion time, first stage of corrosion,
By outputting the corrosion allocation time and cylinder rotation speed for the 2nd and 3rd stages, as well as the expected cell j11!1 eclipse depth when corroded under the preset corrosion conditions, and printing out the error value from the cell setting depth. The resist that is about to corrode is devised so that it can be checked in advance to determine whether it is ``YES'' or ``NO'' regarding the possibility of corrosion progressing under the one-shot corrosion conditions calculated by arithmetic processing.

If "No" is displayed or printed out, you can recalculate the corrosion conditions by re-baking resist 1 or using a different corrosive solution with a different concentration.The output format is printed paper. Other magnetic card output devices (card writers)
It may be outputted to a liquid corrosive machine, or it may be linked in-line directly to a liquid corrosive machine via a dedicated interface. The so-called corrosive machine has simple sequence control, etc., and is capable of automatically proceeding with one-component corrosion according to the calculated corrosion conditions, and can be an inexpensive, completely unmanned corrosive machine. Note that the device body 2
A stand 300 is provided next to 00 on which the measurement tool 100 is stored when not measuring.If a material with good liquid absorption such as blotting paper is placed on the surface of the stand, measurement can be performed easily. It is possible to provide the effect of wiping off the test liquid remaining on the resist electrode of the part tool. The main body of the device may be covered with a simple cover.

In addition, the lead Ivj110 should originally be as short as possible so that the displayed value on the main body of the device can be determined visually from the location of the measuring tool, but if necessary, as shown in Figure 1, it may be extended for several meters or more. You can leave it as is. Furthermore, the resist inspection section may be separated and the corrosion condition calculation device may be used as a mere calculator, and the test liquid penetration time X and set cell depth y may be inputted to determine the conditions.

As described above, the present invention makes it possible to quickly calculate the optimum corrosion conditions suitable for the characteristics of the resist before corrosion, and therefore has the following effects.

■ Preset control corrosion is possible and rotation speed is variable - stabilization, efficiency, and automation of liquid corrosion systems.

(2) '? (f) Corrosion production can be performed in commercial corrosion, so the cell depth with excellent reproducibility according to the gradation of the image on the plate material of the gravure printing plate requires less skill just by controlling the corrosion process. It is possible to produce stable and high quality gravure printing plates.

(3) Since it is possible to produce stable and high-quality gravure printing plates, the burden of plate repair in the subsequent process is greatly reduced.

(a)) Corrosion can be carried out according to the optimum corrosion conditions, and only one corrosive liquid with a predetermined concentration needs to be used, so the operation of the 14-corrosion process and the corrosion equipment can be simplified; With an inexpensive corrosive machine, it is possible to perform unmanned corrosive work with higher precision.

(Li) Furthermore, since the possibility of corrosion progression can be checked before corrosion under the calculated corrosion conditions, this device also has the functionality of a resist diagnostic tool, and in the case of a defective resist that has been checked out. In this case, only the resist needs to be remade, and the time-consuming and expensive printing plate material can be used as is.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the overall appearance of the device according to the present invention;
Yang Figures 2 and 3 are explanatory diagrams showing the structure of the measuring tool in the apparatus shown in Figure 1, Figure 4 is an explanatory diagram showing the external shape of the calculation device main body in the apparatus shown in Figure 1, and Figure 5 is an explanatory diagram showing the external shape of the calculation device main body in the apparatus shown in Figure 1. Figure 1 is a block diagram showing the circuit configuration of the device, Figure 6 is an operational characteristic diagram of the measuring circuit built into the calculation device of Figure 4, and Figure 7 is the penetration time of the test liquid into the gravure printing plate resist. FIG. 8 is a characteristic diagram showing the relationship between the penetration time of the corrosive liquid, and FIG. Flowchart for explaining the operation of the apparatus, Part 1 (Figure 1 shows an example of the output from the output section of the apparatus shown in Figure 1, Figure 11 shows the penetration time of the test liquid into the gravure printing plate resist versus the cell setting depth. FIG. 12 is a schematic vertical cross-sectional view of the resist and copper layer of the gravure plate material. 1... Gravure plate resist, 2... Gravure plate steel layer, 3... Gradation scale, 100... Measuring unit tool, 110... Lead wire, 121... Magnet, 123
... Electrode guide, 125 ... Clear key, 126.
...Input instruction key, 130°131...Regis) to pole, 132...Guide, 200...Calculation device main body, 2
70...power cord, 300...tool inquiry. Applicant's agent Seiji Inomata Figure 7 Figure 8 Narrow armpit immersion time χ Figure 11 Figure 12

Claims (1)

[Claims] Equipped with the following measurement unit tool and calculation device main body (B), the rotation speed is variable based on the relationship between the test liquid penetration time and the cell setting depth at each stage of the gradation scale of the gravure printing plate resist. Corrosion condition calculation device for gravure plate making that calculates corrosion conditions for corrosion method. (A tool body to be mounted on the resist of the N gravure plate material, an element supported by the tool body and guiding the dropping of the test liquid onto the gradation scale of the resist, and an element supported by the tool body and the part to be inspected. A measuring part tool having a resist electrode provided so as to be in contact with the plate via a test liquid, and a plate material electrode connected to the tool body and connected to the gravure plate material. (B) This measuring part tool. a circuit for measuring a measurement signal given from a circuit; an operation main input section for forming an input signal by operation; a storage section for storing basic data obtained in advance; A calculation device main body that includes an arithmetic processing section and an output section that perform calculations based on input to calculate optimal corrosion conditions.