JP3482561B2 - Proper water and dampening water for offset printing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of proper water for offset printing and dampening water for offset printing used in offset printing.

[0002]

2. Description of the Related Art Conventionally, tap water, ground water (well water), etc. have been used as they are for offset printing.

[Problems to be Solved by the Invention]

However, in the tap water, the ground water (well water), etc., which have been conventionally used to make the dampening water for offset printing, the tap water and the ground water (well water) are water depending on the region and the season. In some cases, stable offset printing could not be performed because the substances contained in and the amount of the substances were not constant.

Therefore, water having a hardness suitable for offset printing is required. Therefore, it is an object of the present invention to provide appropriate water for offset printing and dampening water for offset printing, which has hardness suitable for offset printing and is extremely suitable for offset printing that can be controlled by electrical conductivity. Is.

[0005]

In order to solve the above problems, the present invention provides distilled water having an electric conductivity (electrical conductivity) of 0 to 10 micro Siemens / cm and a hardness close to 0 ° DH. , Pure water, ultrapure water, or ion-exchanged water, to which an appropriate amount of calcium chloride aqueous solution was added, the composition and electrical conductivity (conductivity) of the appropriate water for offset printing are 0 to 10 microsiemens / cm and hardness 0 ° DH
After adding an appropriate amount of calcium chloride aqueous solution to one of the following distilled water, pure water, ultrapure water, and ion-exchanged water, a dampening liquid was added to form a dampening water for offset printing. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The manufacturing process of dampening water used for offset printing according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a diagram showing a manufacturing process of a first embodiment 1 of a fountain solution for offset printing according to the present invention.

FIG. 2 is a manufacturing process of a second embodiment of the dampening water for offset printing according to the present invention, and FIG. 3 is a manufacturing process of a third embodiment of the dampening water for offset printing according to the present invention. FIG. 4 is a fourth part of the fountain solution for offset printing according to the present invention.
The manufacturing process of an Example is shown.

FIG. 1 is a flow chart showing a manufacturing process of proper water for offset printing according to the present invention.

As shown in FIG. 1, in the first embodiment of the manufacturing process 1 of the dampening water for offset printing according to the present invention, the calcium chloride aqueous solution is added to the distilled water 2 and the mixture is stirred to prepare the offset printing proper water 3. To manufacture.

As the calcium chloride aqueous solution, calcium supplement (trademark) manufactured by Coral Life Co. of the United States is used. Appropriate water for offset printing is manufactured by adding the calcium chloride aqueous solution and stirring. Add at room temperature and stir.

Here, the calcium chloride aqueous solution to be added and stirred is a calcium chloride aqueous solution which is a calcium supplement (trademark) manufactured by Coral Life Co., Ltd. in the United States. This calcium chloride aqueous solution was mixed with 10 liters of pure water containing 27 cc of calcium supplement (trademark) manufactured by Coral Life Co., Ltd. in the United States, and mixed at 10 ° C.
It is an aqueous solution adjusted to be 80 micro-dimensions.

A necessary substance is added 4 to the proper offset printing water 3 produced by adding and stirring an aqueous calcium chloride solution. The necessary substance is H liquid, which is a liquid called a dampening liquid (Conbinson V103 manufactured by Fanson Co., Ltd.).
2) is added.

H liquid = moisturizing liquid is the Conbinson V1032
(Trademark), the Conbinson V1032 is H liquid = humidifying liquid having the following components and properties.

[0014] Product name Conbinson V1032 (trademark) Specific mixture of substances Ingredient Sodium salt, cellulose derivative Appearance Light blue liquid Odor weak odor Specific gravity − Boiling point> 100 ° C (760mm Hg) Vapor pressure- (20 ℃) Specific gravity of steam <1 (air = 1) Solubility in water

As described above, by adding the dampening liquid (H liquid) having the above components and properties to the proper offset printing water 3, it is possible to produce the offset printing dampening water 4a suitable for offset printing. it can.

Not only the H liquid is added, but also the H liquid may be added and an alcohol (IPA) may be added if necessary. Further, an alcohol terminator may be added instead of the alcohol (IPA).

As the alcohol terminator to be added, it is necessary to add an alcohol terminator having the following components and properties.

[0018]   Product name Alcohol terminator ATC300   Specific mixture of substances   Ingredients Nonionic surfactant, glycerin   Appearance, etc. Colorless liquid   Odor weak organic odor   Specific gravity 0.99 (20 ℃)   Boiling point> 100 ° C (760mm Hg)   Vapor pressure <1mmHg (27 ℃)   Specific gravity of steam <1 (air = 1)   Soluble in water   Flash point 148 ℃

The reason why the alcohol terminator is added in place of alcohol is that alcohol is considered to be harmful to the environment and human health. The dampening liquid and alcohol terminator added to the proper water for offset printing of the embodiment shown in FIGS. 2 to 4 are the same.

FIG. 2 is a flow chart showing a manufacturing process of another embodiment of the proper water for offset printing and the fountain solution according to the present invention.

With respect to the proper water for offset printing and the dampening water 5 of this embodiment, as shown in FIG.
Then, the necessary substance 4 can be added to the fountain solution 4a for offset printing. Here, the necessary substance 4 is the moisturizing liquid =
Solution H is Conbinson V1032.

Also, in the proper water for offset printing and the dampening water of this example, not only the H liquid is added, but also the H liquid is added as necessary and the alcohol (IP
A) may be added. In addition, the alcohol (IP
An alcohol terminator may be added instead of A).

FIG. 3 is a flow chart showing the manufacturing process of another embodiment of the fountain solution for offset printing according to the present invention.

With respect to the proper water for offset printing and the dampening water 7 of this embodiment, as shown in FIG. 3, the calcium chloride aqueous solution is added to the ultrapure water 6 and the mixture is agitated to obtain the substances necessary for the proper water for offset printing 3. Dampening water for offset printing 4
a can be manufactured. Here, the required substance 4 is the moistening liquid = H liquid, which is the above-mentioned Conbinson V1032.

Also, in the proper water for offset printing and the dampening water of this example, not only the H liquid is added, but also the H liquid is added as necessary and the alcohol (IP
A) may be added. In addition, the alcohol (IP
An alcohol terminator may be added instead of A).

FIG. 4 is a flow chart showing the manufacturing process of another embodiment of the fountain solution for offset printing of the present invention.

As the appropriate water for offset printing and the dampening water 9 of this embodiment, as shown in FIG. 4, ion-exchanged water 10 is used, and an aqueous calcium chloride solution is added to this ion-exchanged water 10 and stirred to offset the water. It is possible to produce the proper printing water 3 and add necessary substances to the proper offset printing water 3 to produce the fountain solution 4a for offset printing. Here, the required substance 4 is the moistening liquid = H liquid, which is the above-mentioned Conbinson V1032.

Also, in the proper water for offset printing and the dampening water of this example, not only the H liquid is added, but also the H liquid may be added and isopropyl alcohol (IPA) may be added if necessary. good. Further, an alcohol terminator may be added instead of the isopropyl alcohol (IPA).

In the manufacturing process of the dampening water for offset printing shown in FIGS. 1 to 4, chlorination added to distilled water, pure water, ultrapure water, ion-exchanged water or the like in order to manufacture proper water for offset printing. The amount of calcium aqueous solution added is different.

In any case, stable offset proper water can be obtained within the required permissible range, but distilled water, pure water, ultrapure water, ion-exchanged water, etc. should have the following amounts. It is preferable to add an aqueous calcium chloride solution.

An aqueous solution of calcium chloride was added to the distilled water.
Add 52%. 0.27% calcium chloride aqueous solution is added to pure water, 0.52% calcium chloride aqueous solution is added to ultrapure water, and 0.2 to 0.27% calcium chloride aqueous solution is added to ion-exchanged water. good.

Although ion-exchanged water is treated in the same manner as pure water, the purity of the ion-exchanged water tends to gradually decrease due to the structure of the apparatus.
In any case, the offset printing proper water 3 having a stable value within the required allowable range can be obtained.

As described above, the proper offset printing water 3 produced by adding an aqueous calcium chloride solution to distilled water, pure water, ultrapure water, ion-exchanged water, etc. and stirring the water has an electric conductivity (electric conductivity). The hardness is 0 to 10 micro Siemens / cm and the hardness is 0.
This is an aqueous solution for offset printing in which the calcium chloride aqueous solution is added to distilled water, pure water, ultrapure water, ion-exchanged water, etc. close to ° DH to stabilize the calcium ion concentration within the allowable range.

The proper water 3 for offset printing obtained by adding and stirring an aqueous calcium chloride solution to distilled water, pure water, ultrapure water or ion-exchanged water can obtain the electric conductivity (conductivity) and hardness required for offset printing. It is a stable aqueous solution that can be produced and has a pH value within an allowable range.

In order to confirm whether or not the proper offset printing proper water 3, 3, 3, 3 was obtained, the offset printing proper water 3 was measured by the following method.

According to the JIS standard, the electric conductivity (conductivity) of ions changes when the temperature changes, so it is necessary to obtain the electric conductivity (conductivity) at a constant temperature by the following method. The electric conductivity (conductivity) measured at a certain temperature is shown in the following formula. The measuring equipment and materials used are as follows.

[0037] (1) Hardness unit: German hardness (° DH) is used (2) Measuring equipment used to measure electrical conductivity       Marfied's TDS meter, unit: 10 micro Siemens / cm ± 10 (3) Unit of electric conductivity: micro-dimensions (4) Hardness meter for measuring hardness: Total Hardness Test hardness meter manufactured by MERCK                         Made by TETRA TRAKE Co., Ltd. DH measuring liquid German hardness 1 ° DH                         unit (5) Equipment for pH measurement: ISET pH Meter KS701 manufactured by Shindengen Industry Co., Ltd. is used.                             Paper meter (6) Water used: Pure water (7) Calcium solution with addition and stirring: Calcium support manufactured by USA Coral Life Co., Ltd.                                   Calcium chloride as a supplement (trademark)                                   Aqueous solution

In the above-described process for producing proper water for offset printing, when distilled water, pure water, ultrapure water, or ion-exchanged water was used, the addition amount of the calcium chloride aqueous solution was different. It was verified whether it is possible to obtain a stable offset printing proper water using "water".

In the verification, the offset printing application water 3 having a desired hardness of 4 ° dH is obtained. Pure water 1 prepared as described above
To 0 liter, 10 parts of calcium chloride aqueous solution which is the calcium supplement (trademark) manufactured by Coral Life Co., Ltd.
As a result of producing and verifying proper water for offset printing (appropriate water using pure water) to which 27 cc of an aqueous solution of calcium chloride diluted 10 times and diluted 10 times was produced and verified, the following results were obtained. * Since calcium supplement has an error in concentration, it was added after adjusting the concentration.

Appropriate Degree of Water Use of Pure Water 6.5 ℃ Electric Conductivity 170 Micro Siemens / cm Hardness 4 ° DH (Tetra Beruque) Proper Use of Pure Water Water Degree of 10 ℃ Electric Conductivity 180 Micro Siemens / c
m Hardness 4 ° DH (Tetra Beque) Use of pure water Appropriate water degree 15 ° C Electric conductivity 190 micro Siemens / c
m Hardness 4 ° DH (Tetrabeque) Use of pure water Appropriate water 20 ° C Electric conductivity 210 micro-Jemens / c
m Hardness 4 ° DH (Tetra Beque) Use of pure water Appropriate water degree 25 ° C. Electric conductivity 220 micro Siemens / c
m Hardness 4 ° DH (Tetra balque)

From the above verification data, the hardness is "hardness" even if the temperature of the proper water for offset printing using pure water changes.
It was confirmed to be extremely stable at 4 ° DH (Tetra ke). It was also confirmed that the electric conductivity increases with the temperature of the proper water for offset printing using the pure water.

Next, the following test was carried out in order to obtain a change in the electric conductivity of hardness 4 ° DH in proper water using pure water which is the proper water for offset printing. At the proper water temperature for offset printing of 6.5 ° C manufactured using pure water,
Change in hardness of appropriate water for pure water when adding 10 ml of pure water to an aqueous solution of calcium chloride diluted 10 times with pure water, stirring, and changing the amount of the appropriate water for offset printing using the pure water Was measured. The test results were as follows.

Calcium chloride aqueous solution 29cc Electric conductivity 190 micro Siemens / cm hardness 4 ° DH Calcium chloride aqueous solution 30 cc Electric conductivity 190 micro Siemens / cm hardness 4 ° DH Calcium chloride aqueous solution 31 cc Electric conductivity 190 micro Siemens / cm hardness 4 ° DH calcium chloride aqueous solution 32cc electric conductivity 200 micro Siemens / cm hardness 5 ° DH

From the above test results, the electric conductivity was "190 micron regardless of whether the amount of the calcium chloride aqueous solution added to the proper water for offset printing using pure water and stirred was 29 cc, 30 cc, or 31 cc. Siemens / cm ",
The hardness is also “hardness 4 ° DH (television)”, and when 32 cc was added from the above test, the hardness became 5 ° DH and increased by 1 ° DH.

From this test result, it was found that if the hardness is "4 ° DH or more and less than 7 ° DH", it can be used as proper water for offset printing. And the best hardness for proper water for offset printing is "4 ° DH".
It turned out to be Electric conductivity (conductivity) at this time
Is 190 micro Siemens / cm.

Further, in order to make the hardness of the proper offset printing water using pure water 5 ° DH, pure water obtained by adding 32 cc of calcium chloride aqueous solution to 10 liters of the proper offset printing water using pure water is used. The change in electric conductivity of the proper water for offset printing used was examined. The test results were as follows.

Proper water temperature using pure water 6.5 ℃ Electric conductivity 200
Micro Siemens / cm Hardness 5 ° DH Pure Water Appropriate Water Temperature 10 ℃ Electric Conductivity 220 Micro Siemens /
cm Hardness 5 ° DH Pure water proper water temperature 15 ° C. Electric conductivity 230 micro Siemens /
cm Hardness 5 ° DH Pure water proper water temperature 20 ° C Electric conductivity 250 micro Siemens /
cm Hardness 5 ° DH Pure water proper water temperature 25 ° C. Electric conductivity 280 micro Siemens /
cm hardness 5 ° DH

From the above test results, the hardness of the proper water for offset printing using pure water is 5 ° DH (Tetra ke ke)
It was confirmed that when the temperature of the proper offset printing water using pure water rises, the electrical conductivity of the proper offset printing water using pure water also rises.

In the water used for offset printing,
It was found that "hardness" is important, and the electrical conductivity has a wide tolerance range with respect to changes in temperature.

Among the proper water for offset printing, the best proper water for offset printing has an electric conductivity of 0 micro-dimens.
It is an aqueous solution in which a hardness of 4 ° DH or more and less than 5 ° DH is adjusted by adding an aqueous calcium chloride solution to 10 micro Siemens pure water, distilled water, pure water, ultrapure water, ion-exchanged water or the like and stirring the mixture.

As described above, any one of pure water, distilled water, pure water, ultrapure water, ion-exchanged water, etc., having an electric conductivity of 10 microliters and an electric conductivity of 0 microsiemens / cm to 10 microsiemens / cm. , 27 cc of calcium chloride aqueous solution is added and stirred to add appropriate dampening liquid (H liquid) to offset printing proper water whose hardness is adjusted to 4 ° DH or more and less than 5 ° DH, and dampening water for offset printing To manufacture.

As the dampening water for offset printing, a dampening liquid (H liquid) is added to the proper water for offset printing. If necessary, isopropyl alcohol (IPA) is used in addition to the dampening liquid (H liquid). Alternatively, an alcohol terminator (trademark), which is an alcohol substitute, may be added.

Damping water 4a for offset printing according to the present invention
Then, as the moisturizing liquid (H liquid), Convinson V1032 (trademark) manufactured by Fanson of the Netherlands was added, and as an alcohol substitute, alcohol terminator (trademark) manufactured by DAA International of the US was added. The electric conductivity of the dampening water for offset printing was determined. The results are as follows.

(1) The electrical conductivity of the fountain solution for offset printing manufactured under the following conditions was verified. 10 liters of pure water, aqueous calcium chloride solution 27 cc Water temperature of pure water 14 ° C Combison 3% Alcohol terminator 1% As a result, the electric conductivity of this dampening water for offset printing is
It was 1120 micro Siemens / cm.

(2) The electric conductivity of the dampening water for offset printing manufactured under the following conditions was verified. Pure water 10 liters Calcium liquid 32cc Pure water temperature 14 ° C Combison 3% Alcohol terminator 1% As a result, the electric conductivity of this dampening water for offset printing is
It was 1160 micro Siemens / cm.

In the JIS standard, the electric conductivity is 25 ° C. as a reference temperature, and the electric conductivity at each temperature can be converted by the following formula. K25: electric conductivity at 25 ° C Kt: electric conductivity at t ° C t: water temperature at the time of measurement

The dampening water for offset printing of the above (1) is
From the above formula for calculating the electric conductivity (conductivity),
It is calculated as 1435.8974. Further, the dampening water for offset printing of the above (2) was obtained as 1487.1794 from the above equation for obtaining the electric conductivity (conductivity).

As described above, it was confirmed that the electric conductivity of the dampening water which can be used as the dampening water for offset printing is 1000 micro Siemens / cm to 2000 micro Siemens / cm. And the preferable electric conductivity (conductivity) of the dampening water for offset printing is 1200 micro Siemens / cm-1500.
Micro Siemens / cm.

In an actual printing site, ink, paper powder, etc. are mixed in the dampening liquid on the printing machine, so that the electric conductivity gradually increases. Therefore, it is important to set the printable range of the electric conductivity of the fountain solution for offset printing.

Of the proper water for offset printing, the best proper water for offset printing is pure water, distilled water, pure water, ultrapure water, which has an electric conductivity of 0 to 10 micro Siemens.
An aqueous solution of which hardness is adjusted to 4 ° DH or more and less than 5 ° DH by adding an aqueous calcium chloride solution to ion-exchanged water and stirring the mixture.

[0061]

EFFECTS OF THE INVENTION Since the present invention has the constitution as described above, it is possible to stabilize the concentration of calcium ions within the allowable range, obtain the electric conductivity (conductivity) and hardness, and also the pH value. A stable fountain solution can be obtained within the allowable range.

In the process for producing proper printing water, distilled water,
Whether you use pure water, ultrapure water, or ion-exchanged water, the amount of calcium added is different, but it is a stable value within the required tolerance range. The printed matter does not become dirty even when used and printed.

[Brief description of drawings]

FIG. 1 is a diagram showing a manufacturing process of proper water for offset printing and dampening water according to the present invention.

FIG. 2 is a diagram showing another embodiment of the process for producing proper water for offset printing and dampening water according to the present invention.

FIG. 3 is a diagram showing another embodiment of the process for producing the proper water for offset printing and the dampening water according to the present invention.

FIG. 4 is a diagram showing another embodiment of the process for producing the proper water for offset printing and the dampening water according to the present invention.

[Explanation of symbols]

1 Manufacturing process of dampening water for offset printing 2 distilled water 3 calcium addition stirring 4 Add necessary substances 4a Dampening water for offset printing 5 Damping water manufacturing process for offset printing 6 pure water 7 Damping water manufacturing process for offset printing 8 ultrapure water 9 Damping water manufacturing process for offset printing 10 ion-exchanged water

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-11659 (JP, A) JP-A-5-264445 (JP, A) JP-A-5-139068 (JP, A) JP-A-11- 77043 (JP, A) JP-A-7-276846 (JP, A) JP-A-11-291659 (JP, A) JP-A-2-107491 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41N 3/08 101

Claims (6)

(57) [Claims] 1. Suitable for offset printing, characterized in that an appropriate amount of calcium chloride aqueous solution is added to distilled water having an electric conductivity (electrical conductivity) of 0 to 10 microsiemens / cm and a hardness close to 0 ° DH. water. 2. The proper water for offset printing according to claim 1, wherein the distilled water is pure water. 3. The proper water for offset printing according to claim 1, wherein the distilled water is ultrapure water. 4. The proper water for offset printing according to claim 1, wherein the distilled water is ion-exchanged water. 5. Appropriate water for offset printing produced by adding an appropriate amount of calcium chloride aqueous solution to distilled water having an electric conductivity (electrical conductivity) of 0 to 10 microsiemens / cm and a hardness of near 0 ° DH, Damping water for offset printing, which is characterized by adding a dampening liquid. 6. Appropriate water for offset printing produced by adding an appropriate amount of an aqueous calcium chloride solution to distilled water having an electric conductivity (electrical conductivity) of 0 to 10 microsiemens / cm and a hardness of near 0 ° DH, Dampening water for offset printing, characterized by adding a dampening liquid and alcohol.