JPS6030752Y2 - Color chart for hue specification and confirmation in multicolor printing - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a color chart for specifying a hue to a document in multicolor printing and for confirming the printed hue.

As is well known, color reproduction in multi-color printing is achieved by inks of four basic colors: cyan (symbol: 2C), magenta (symbol: M), yellow (symbol: Y), and black (symbol: BL), which are subtractive color mixtures. Either alone or in an appropriate combination, halftone dots are printed and reproduced on the printing surface as a whole.

In addition, the shade of a color is reproduced by the size of the halftone dots, and the degree of shade is expressed by the halftone dot area ratio, which ranges from 100%, where the ink is sticky, to 0%, where only the white background of the paper appears.

Therefore, for example, if a predetermined portion of a document has a halftone dot area ratio of 9.
0% cyan, area ratio 70% magenta, area ratio 50%
In general, to indicate that the hue is reproduced by mixing yellow with area ratio of 30% and black with an area ratio of 30%,
"'C (90) 10M (70) 10Y (50) 10B
L (30)" or C-90, M-70, Y-50,
BL-30" and so on.

However, in this simple symbol string display, the hue is specified by reading out the desired mixture of hues selected from a color chart and transcribing them onto a predetermined design or character part of the manuscript. Generally, a color chart shows each mixed color when two of the four basic colors have a fixed area ratio and the area ratio of the other two is changed in the vertical and horizontal directions. Since it was in the form of a single book with each page displayed on one page, it was easy for misreading and typographical errors to occur due to human error.

In addition, hue indication using such symbols can be used to find out the actual hue individually and simultaneously from the color chart of one book type, and to check the corresponding color on the manuscript when considering and correcting the overall color scheme of the manuscript. This was extremely inconvenient and impractical because it had to be adapted to each part.

With the sole purpose of overcoming these drawbacks, it has been suggested in the applicant's earlier application, Utility Model Application No. 1983-54946, in which a strip-shaped structure having several sections made separable by perforations is proposed. A sheet of paper with various hues printed on it and a symbol indicating the color mixing relationship of the hues written in each area is prepared, the area of the selected hue is cut out, and it is attached to a predetermined part of the manuscript. The aim was to avoid human error and simplify the examination and correction of color schemes.

However, even with this method of attaching practical color samples, if you feel a slight difference between each hue after printing and the specified hue, or if you print as specified, which is the ultimate goal, In order to find out which basic color was printed with the wrong area ratio, find the corresponding area on the color chart and look at each one with a magnifying glass. It is extremely complicated and requires the use of a color chart in a place where it is easily stained with ink, etc., and the color sample posted on the color chart is stained and cannot be used. There was a great risk that it would cause damage.

Therefore, an object of the present invention is to provide a color chart that eliminates the above-mentioned drawbacks and allows hue designation at the document stage and hue confirmation at the printing stage to be easily performed.

Another object of the present invention is to provide a color chart that allows hue confirmation to be easily performed even during printing.

Still another object of the present invention is to provide a color chart that allows even beginners to easily and reliably perform multicolor printing and hue confirmation.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a diagram showing one sheet of the basic constituent parts of a color chart according to an embodiment of the present invention, in which color chart 1 is a pure white paper member such as art paper or high-quality paper, a pure white film material member made of synthetic resin, or other material. It consists of at least one mount 2 formed by a printable paper-like or sheet-like member into a strip, rectangle, or any other suitable planar shape that can perform the relationships that will become clear from the description below.

For reasons that will become clear later, the mount section 2 has a plurality of color indication areas (four color indication areas in the illustrated case) 3.
is provided at its end or at any other suitable location, and the main portion 4 excluding area 3 is provided as a color sample area.

In the areas 4 of the mount portion 2, various hues normally applied for color samples are respectively represented by well-known halftone coloring means such as printing.

On the other hand, each of the areas 3 having a plurality of divisions is displayed in the same manner as the basic colors constituting the hue represented in the area 4.

In addition, the mount part 2 is attached to the area 4 in a relationship that can clearly indicate the mutual positional relationship of areas 3 or adjacent parts or areas 3.
The dot area ratio of the basic color applied to each area 3 is indicated by a symbol 5 (for example, C90, M2O, Y2O, BL3Q).

The mount portion 2 formed as described above is usually integrated with at least one other mount portion 2 formed in the same manner as shown in FIG. 2, as shown in FIG. However, when in use as will be described later, they are connected by a means that allows them to be separated by hand, one by one, thereby forming a color chart 1 for one hue.

This color chart 1 together with another similar color chart having a different hue,
It will be easily understood that it takes the form of a set of color sample cards.

A set of color chips configured as described above is obtained by selecting a color chart 1 corresponding to a desired hue based on the hue displayed in the area 4 of each color chart at the manuscript stage, and placing the selected color chart on the mount 2 of the selected color chart. The hue specification to the manuscript is completed by cutting it out along the perforation 6 and attaching it by fixing means such as pasting it near a predetermined part of the text or design of the manuscript to which the hue is applied, and only the conventional symbols are used. It is possible to avoid human errors that tend to occur in the case of

Next, in the printing stage, the color mixture relationship of the hues is quantitatively read from the symbol 5 written on the mount 2 attached to the original, and multicolor printing is performed by a well-known process.

At this printing stage, proof printing is performed as a whole, but it is important to check whether the hue of the printed product matches the specified hue or not. It should be noted that this can be accomplished quite easily by comparison with area 4 of the mount section attached.

In addition, when you think there is a difference as a result of comparing the two, or when you want to confirm that they are the same, you can change the halftone area ratio or halftone shape of each basic color of the printed color to the conventional standard color. It should also be noted that distant relatives can be easily determined by comparing the color display of each basic color in each area 3 of the mount section used for color designation, rather than searching from a chart.

FIG. 3 is a diagram showing a mount portion 2 which is a basic component of a color chart according to another embodiment of the present invention, and has the same shape except for the structural relationship of the area 3 described in the previous embodiment.

Area 3, which is the special color of this embodiment, is charted in accordance with the commonly used printing order of basic colors. For example, the hue appearing in area 4 is C: 60%, M: 40%. %,Y
If printing is performed in the order of 280% and BL: 10%, the color of C: 60% is displayed in the first area 3a, and the basic color halftone area ratio like C60 is displayed in or near the area. is displayed as a symbol.

Next, in the second area 3b, the mixed color of C: 60% and M: 40% and the symbol of the added basic color halftone area ratio, ie, A40, are similarly displayed.

Similarly, in the third area 3C and the fourth area 3d, C:6
0% and M: 40% and Y: 80% and C: 60%
, M: 40%, Y: 80% and BL: 10% are displayed in each color, and additional basic area ratio symbols Y2O and BLIO are similarly displayed, respectively.

This makes it possible to confirm whether the printed color is the same as the specified color at any stage of the multicolor printing process, including proof printing, by searching and comparing it from the color chart. Note that it is faster and more reliable than

In each of the embodiments described above, it has been explained that the area 3 has four areas, which is the number of basic colors, but for example, cyan and yellow have an effective halftone area ratio, but magenta and black have a hue of 0%. When displaying a hue in which at least one of the basic colors is missing, the corresponding area may be displayed with diagonal lines, but it is preferable to represent the hue with a number of areas corresponding to the number of basic colors required. As a result, display can be performed in a relatively large area, and misreading due to unnecessary display can be avoided.

Further, the positional relationship between each area 3 for indicating the hue of the area 4 by dot coloring of each basic color and each symbol 5 for numerically indicating the halftone area ratio of each area 3 is as described above. As mentioned above, they can take any shape as long as they have a positional relationship that substantially corresponds to each other.

However, as shown in FIG. 4, by displaying each symbol representing the corresponding halftone area ratio in each area 3, each symbol 5 is a numerical value representing the halftone area ratio of its corresponding basic color. It is sufficient to state only the

As a result, the halftone dot area ratio of each basic color can be more easily determined from the same location in terms of color and numerical value.

Further, in the above-mentioned set of color sample cards, the number of color sample cards to be prepared is also infinite due to infinite combinations of each basic color.

Therefore, as a typical feature, the halftone area ratio is set to 0, for example.
%, 10%, 20%, 30%...80%, 90
%, 100%, etc., and cards are created in combination with each basic color.

However, even in this case, the number of combinations for one basic color having 11 types of dot area ratios is enormous, and it is difficult to obtain a desired hue by simply specifying the dot area ratio of each basic color. Designation is extremely complicated to handle.

Therefore, in order to more easily indicate the hue of the colored area 4, as shown by reference numeral 7 in FIG. 4, it is preferable to provide, for example, a series of hue indicating symbols.

The hue indication code 7 may be placed at any position within the mount portion 2, but it may be placed in any area 3 and/or indicative of the basic color relationship between the hue indication code 7 and the hue specified by it. Preferably, it is provided appropriately in the vicinity of symbol 5.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, showing a mount section which is a basic component, Fig. 2 is a plan view showing the general or conventional form of the thing shown in Fig. The figure is a diagram similar to FIG. 1 according to another embodiment of the present invention, and FIG. 4 is a diagram similar to FIG. 1 showing a modification of the means for indicating hue. 1...Color chart, 2...Mount part, 3...
... Area for color indication, 4 ... Area for color sample, 5 ... Symbol, 6 ... Perforation.

Claims (2)

[Scope of utility model registration request] (1) Color sample area 4 for displaying hues in halftone dots on the surface of the mount portion 2 formed so as to be separable through perforations 6
and a set of basic colors C used in well-known multicolor printing,
One set of color indication areas 3 = 3a, 3bt 3c, 3d are provided for displaying M, Y, and BL in halftone color, respectively, and one set of color indication areas 3, 3a, 3b, 3c, 3d are provided.
Each of the basic colors is displayed with halftone dots having the same ratio as the halftone dot area ratio of each basic color that reveals the hue displayed in the color sample area 4, and the halftone dot area ratio of each basic color is A color chart for hue designation and confirmation in multicolor printing, characterized in that each signal 5 indicating . (2) a set of color designation areas 3.3a that display the halftone area ratio relationships of a set of basic colors C, M, Y, and BL;
The color chart according to claim 1, wherein each of 3b, 3c, and 3d is arranged in an arrangement corresponding to the printing order of commonly used basic colors.