JPH0747677A - Recording method - Google Patents

Abstract

PURPOSE:To realize high speed and high quality by employing at least two types of subscanning having different moving amounts and performing the recording such that the dots are not formed contiguously in subscanning direction at the time of continuous main scanning. CONSTITUTION:In the initial state, a recording head 10 is located at position 1 and forms recording dots 1 while moving in 1 head scanning direction and arrives at position 2 by moving (short skip) a distance two times as long as the interval of recording dot in the subscanning direction. The recording head 10 forms recording dots while moving in 2 head scanning direction. Similarly, the recording head 10 is moved to position 3(long skip) after formation of recording dots 3-5 and then performs the operations of head scanning 1-5 and the short and long skips thus forming recording dots represented by numerals enclosed in parentheses. Since the dots are not formed contiguously by the head scanning in main scanning direction, excellent print quality can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer, and more particularly to a method of recording dots in an ink jet printer.

[0002]

2. Description of the Related Art Inkjet printers have recently been attracting attention as recording devices that are compact and inexpensive and can realize high printing quality. Higher speed and higher print quality are required.

There are three types of inks used in ink jet printers: water-based, oil-based, and wax. The oil-based and wax-based images dry quickly and solidify the recorded image and have good water resistance. Also, it has an excellent aspect such that excellent printing quality can be obtained regardless of the type of paper. However, oily substances have not been generalized because they have disadvantages in their unique odor and safety. Further, the wax type is not generalized because it has a demerit that the ink is required to be heated to a temperature higher than the melting temperature for recording and the apparatus becomes large in size.

On the other hand, an ink using a water-based ink in which a dye is dissolved in water or a pigment is turbid has high ink safety and a device can be realized relatively easily. Water-based ink is used as the ink.

However, since the water-based ink has poor absorbency and dryness to the recording paper, the ink ejected from the recording head is not fixed immediately on the recording paper, but is absorbed inside the recording paper or vaporized by evaporation. Exists as droplets. Microscopically, the surface of the recording paper has uneven absorption of droplets, so strictly speaking, the adhered ink droplets do not remain as a perfectly circular recorded image, but an image of an uneven shape such as an ellipse. Will be formed. However, since the ink droplets ejected from the recording head are extremely minute, the surface tension of the droplets is relatively large, and the droplets are not affected by the unevenness of the recording paper so much that they are relatively circular. An image can be formed. However, if adjacent dots are formed before the ink droplets are completely absorbed by the recording paper, the ink droplets are integrated and become large on the recording paper. For this reason, the surface tension of the ink becomes relatively small, the influence of the uneven absorption of the recording paper is large, and the shape of the ink tends to become distorted such as an ellipse, which adversely affects the quality of the printed image. In particular, in the case of a color inkjet printer that ejects inks of multiple colors in order to perform color recording, when adjacent ink droplets have different colors from each other, by combining as described above, the colors are mixed and the colors become cloudy, A great adverse effect such as the deviation of

On the other hand, as disclosed in Japanese Examined Patent Publication No. 4-190030 and Japanese Examined Patent Publication No. 3-231861, the group of dots which is conventionally printed by one scan of the print head is scanned twice. It has been attempted to reduce the adverse effects of the adjacent dots as described above and improve the printing quality by dividing the above into two steps. FIG. 8, FIG. 9, and FIG. 10 show print dots printed by an inkjet printer that forms a dot group by dividing into two scans. The print dots indicated by 1 are the forward path of the print head. The print dots printed by the first scan and the print dots shown by the second print dot group are printed by the second scan, which is the backward pass. Since the dot 1 is absorbed by the recording paper when the recording dots 2 are formed, the droplets forming the dots 1 and 2 are not integrated on the recording paper. As can be seen from these figures, when the print dots are formed by two scans, the maximum number of adjacent dots of the dots formed by the same scan is two. For example, the dot indicated by a in FIG. 8 is printed by the second scan, and the adjacent dots that can be simultaneously printed at this time are only two print dots indicated by b. However, in the case of a printing method in which all the dots shown in the figure are printed by one scan, there is a possibility that six adjacent dots shown by c may be printed, and the dots are divided into two scans. It can be seen that the adjacent dots which may be integrated can be greatly reduced depending on the recording method to be formed. In fact, these methods were able to greatly reduce the adverse effects of adjacent dots and improve the quality of the printed image.

[0007]

However, in the case of the above-mentioned method, when the recording head scans from the forward path to the backward path, for example, when the recording head scans the recording paper from left to right in the forward path. The time difference between the dots formed on the forward path and the backward path on the right side of the recording paper is relatively smaller than on the left side of the recording paper, and dots on the backward path are formed before the dots recorded on the forward path are completely absorbed. It turns out that there is a high possibility that This appears as a noticeable difference when the scanning speed of the head is increased in order to increase the recording speed, resulting in a clear difference in print quality between the left and right sides of the recording paper.

In order to prevent such a problem, dots are not recorded in the return path, recording is always performed in the outward path, or a sufficiently large time difference between the end of printing in the outward path and the start of printing in the return path can be solved. In any of these cases, the printing speed is reduced, and the original purpose of improving the printing speed cannot be realized. in this way,
With the conventional method, it has been difficult to satisfy both the improvement in printing quality and the improvement in printing speed at the same time.

Therefore, the ink jet printer of the present invention solves such a problem, and its purpose is to reduce the deterioration of the printing quality due to the integration of adjacent dots even when the printing speed is improved. ,high speed,
It is to realize an inkjet printer with high print quality.

[0010]

According to a recording method of the present invention, a main scanning in which a recording head for ejecting ink from a plurality of nozzles is opposed to a recording medium and the recording head is moved relatively to the recording medium, The purpose of forming a recording dot at an arbitrary position on the recording medium by ejecting ink from the nozzles of the recording head while performing a sub-scan relatively moving in a direction perpendicular to the main scanning direction is achieved. In the recording method for obtaining the above-mentioned recording, the sub-scan is composed of at least two kinds of scans having different movement amounts, and recording is performed so that dots in the sub-scanning direction formed during the continuous main scanning are not adjacent to each other. To do. Further, an interval R between adjacent recording dots in the sub-scanning direction of the recording dots is R, a nozzle interval between the recording heads is D, and a movement amount of a small skip which is a first movement of the recording head in the sub-scanning direction. Ss, a moving amount of a large skip, which is the second movement of the recording head in the sub-scanning direction, is Sd, the number of nozzles of the recording head is N, m, n, and k are natural numbers n / k are irreducible fractions When there are m, n, and k satisfying the three conditions of m × k−2 ≧ n ≧ (m−1) × k + 2, D = k × R Ss = n × R Sd = D × N− (k−1) × Ss, the printing operation of ejecting ink from the nozzles while moving in the main scanning direction of the recording head to perform printing on the recording medium, and the small skip are repeated a plurality of times, and the k-th printing operation is performed. After that, the above-mentioned printing that the large skip is performed By repeating the series of operations from work to the large skip, and performs recording on the entire surface of the recording medium. Further, a color head for ejecting inks of a plurality of colors is opposed to a recording medium, and the color head is relatively moved in a direction perpendicular to the main scanning direction in which the main scanning is performed relative to the recording medium. A sub-scanning of the recording dots in a recording method for obtaining a desired recording by ejecting ink from the nozzles of the color head while forming sub-scanning to form recording dots at arbitrary positions on the recording medium. Is R, the distance between nozzles of the color head that eject ink of the same color is D, and the movement amount of a small skip that is the first movement of the color head in the sub-scanning direction is Ss, the amount of movement of a large skip that is the second movement of the color head in the sub-scanning direction is Sd, and the number of nozzles of the color head that eject ink of the same color is N , Dc is the minimum value of the distance between adjacent nozzles for ejecting different color inks, m, n and k are natural numbers n / k is a irreducible fraction m × k−2 ≧ n ≧ (m−1) × k + 2 When there are m, n, and k satisfying the three conditions, D = k × RSs = n × RSd = D × Nc− (k−1) × SsDc ≧ D, and in the main scanning direction of the color head. The printing operation in which ink is ejected from the nozzle while moving, printing is performed on the recording medium, and the small skip is repeated a plurality of times, and the large skip is performed after the kth printing operation. The recording is performed on the entire surface of the recording medium by repeating a series of operations from to the large skip.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mechanism for realizing a recording method according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is a perspective view showing a mechanism of an apparatus for realizing the recording method of the embodiment of the present invention, and FIG. 7 shows a recording head and an ink cartridge used in the recording method of the embodiment of the present invention. It is the perspective view shown.

The recording head 31 is an ink cartridge 32.
And is mounted on the carriage 33. The carriage 33 is guided by two carriage guide shafts 34, 34. Driven pulley 36 and drive pulley 37
A part of the belt 35 stretched between the
It is fixed at 3. The drive pulley 37 has a motor 3
8 is configured to be transmitted. Therefore, the power of the motor 38 allows the carriage 33, the recording head 31 mounted on the carriage, and the ink cartridge 32 to move in the main scanning direction 43. Further, the platen 39 is configured such that its axial direction is parallel to the axial direction of the carriage guide shaft 34, and can be rotated by the power of a paper feed motor (not shown). The recording paper 42, which is a recording medium, is wound around the platen 39 and pressed by the paper pressing roller 40 and the paper feed roller 41, and the recording paper can be moved in the sub-scanning direction 44 according to the rotation of the platen 39. There is. In addition, the recording paper 42 and the recording head 31
The nozzles 45 are configured to closely face each other and face each other. The motor 38, the paper feed motor (not shown), and the recording head are controlled by drive circuits (not shown).

Printing on the recording paper is performed by ejecting ink toward the recording paper from the nozzles of the recording head while the recording head 31 moves in the main scanning direction 43. When printing is performed once, the recording paper is fed in the sub-scanning direction by the rotation of the platen. By repeating the above operation a plurality of times, printing can be performed on the entire recording paper.

FIG. 1 is a diagram for explaining the recording method of the embodiment of the present invention, showing the relative positional relationship between the recording dots and the recording head which are recorded by the recording method of the embodiment of the present invention. Circles indicated by numerals 1 to 5 in FIG. 1 indicate dots recorded by moving the recording head 10 relative to the recording paper in the directions of the head scan 1 to the head scan 5 as shown by the arrows. It is also. Reference numeral 11 indicates the position of the nozzle of the recording head, and the actual nozzle is positioned so as to face the recording paper at the position shown in the figure. Nozzle 1 in sub-scanning direction
3 are arranged at an interval of 5 times the interval of recording dots.

In the initial state, the recording head 10 is positioned on the extension of the recording dot indicated by 1 as shown by the position 1 in FIG. 1, and moves in the direction indicated by the head scan 1 (movement is different from that of the recording paper). It means the relative movement of the recording head,
The same applies to the following), and the recording dots 1 are formed. After the recording of the recording dot 1 is completed, the recording head moves to the position 2 by moving in the sub-scanning direction 13 twice the interval between adjacent recording dots in the sub-scanning direction (this operation will be referred to as a small skip hereinafter). Then, the recording dots 2 are formed while moving in the direction indicated by the head scan 2. In the same manner as above, the head scan 3, the head scan 4, and the head scan 5 are repeated to form the print dots 3, the print dots 4, and the print dots 5, and then the print head is moved in the sub-scanning direction at the above-mentioned print dot interval 7 The recording head is moved to the position 3 by doubling the movement (hereinafter, this operation is referred to as a large skip), and the operations from the head scan 1 to the head scan 5 and the operations of the small skip and the large skip are performed again, and the parentheses are shown in the figure. The recording dots represented by the attached numbers are formed. By repeating such an operation, dots to be printed are formed on the entire surface of the printing paper while sequentially changing the printing area.

When the recording dots are formed in this manner, the dots adjacent to the recording dot 1 in the sub-scanning direction are the recording dots 3 and 4, and similarly, the recording dots 2 are the recording dots 4 and 5, and the recording dots are the same. Recording dots 5 and 1 for 3 and recording dot 1 for recording dot 4
2 and 3, the recording dots 5 are the recording dots 2 and 3, and it is understood that the dots formed by continuous head scanning in the main scanning direction are not adjacent to each other. Therefore, the dots adjacent to each other in the sub-scanning direction can be printed with a larger time difference than the conventional one, and the printing speed is increased. Therefore, even if the scanning speed of the head in the main scanning direction is increased, the dots are adjacent to each other in the sub-scanning direction. Since the dots have already been completely absorbed, it is possible to reduce the adverse effects caused by the integration of the ink droplets.

In the above embodiment, the movement of the head in the main scanning direction is a reciprocating movement, but even if the head is moved in a fixed direction, the same effect can be obtained for the same reason as above. As a mechanism for moving the head in one direction in the main scanning direction, for example, the recording paper is wound around a drum, the recording paper is moved in the main scanning direction by the rotation of the drum, and the recording head is moved in a direction parallel to the axis of the drum. There is one that moves in the sub-scanning direction by moving.

The above recording method will be described in more detail. When the interval between adjacent recording dots in the sub-scanning direction is R, the nozzle interval D of the recording head, the movement amount Ss of the recording head in the sub-scanning direction during a small skip, and the sub-scanning direction of the recording head during a large skip. And the number N of nozzles of the recording head have the following relationship.

D = 5 × R Ss = 2 × R Sd = D × N-4 × Ss (N = 3) In the present embodiment, N = 3, but if N is a natural number, then from the above equation, It is clear that the quantity is determined, and it is clear that N may be a natural number other than 3. Whatever the value of R, D, Ss,
Since Sd is determined, if the desired distance between dots and the desired number of nozzles are determined, the small skip amount and the large skip amount and the nozzle interval of the print head can be determined from the above relational expression. By performing printing while moving the recording head in the main scanning direction and the sub-scanning direction accordingly, the dots formed during continuous head scanning in the main scanning direction are not adjacent to each other as described above. be able to.

Further, we have developed from the above relational expression and found that the condition that the recording dots formed by continuous head scanning in the main scanning direction are not adjacent to each other is expressed by the following relational expression.

M, n and k are natural numbers n / k is a irreducible fraction m × k−2 ≧ n ≧ (m−1) × k + 2 When there are m, n and k satisfying the above three conditions, D = k × R Ss = n × R Sd = D × N− (k−1) × Ss In this case, after the recording head (nozzle interval D) is moved and printed in the main scanning direction, it is determined by Ss. Do a small amount skip. After repeating the above operation and performing the kth movement of the recording head in the main scanning direction and printing,
A large skip of the amount defined by Sd is performed. Where N
If S is small and n is large, there is a condition that Sd is negative. In this case, the large skip is S in the opposite direction to the small skip.
It will move by the absolute value of d.

In the case of the embodiment described with reference to FIG. 1, it can be seen from the above relational expression that m = 1, n = 2, and k = 5. In the case of k = 5, some other ones satisfying the above relationship will be listed below: k = 5, m = 1, n = 3 k = 5, m = 2, n = 7 k = 5, m = 2, n = 8 k = 5, m = 3, n = 12 k = 5, m = 3, n = 13. D, S calculated from these values
When printing is performed by a recording method satisfying s and Sd, dots formed by continuous head scanning in the main scanning direction are not adjacent to each other in any case, but it is written that the value of n, that is, the amount of small skips becomes large. The initial position of the head and the relative position of the actual printable area move away from each other. In FIG. 1, the printable area is the area below the uppermost recording dot 3.
In the area above that, it is impossible to print between the recording dots 1 and 2, and between the recording dots 2 and 3, so that a constant dot interval is not obtained. In this way, the printable area is 4 from the uppermost row of the recording dots 1 where the recording head can start writing.
Only XR apart. On the other hand, in FIG. 2, k = 5 and m =
FIG. 3 is a diagram showing the state of recording dots in the case of 1 and n = 3 in the same manner as in FIG. 1, but in the case of FIG. ing. Here, only the relative position between the writing start of the recording head and the printable area has been described, but the same can be said for the relative end position of the recording head and the relative position of the printable area. For this reason, when n is large even for the same k, the number of unnecessary head scans increases, and the printing speed on one sheet of recording paper becomes slightly slower. Therefore, with respect to n, it is better to select a value as small as possible for the same k.

Among k, n and m which satisfy the above relational expression, k
, The smallest k that satisfies the relational expression is the case of k = 5 described in FIGS. 1 and 2. Next, the smallest k is k = 7, and as an example, the state of recording dots for k = 7, m = 1, and n = 2 is shown in FIG. 3 as in FIG.
Also in this case, it can be seen that the dots printed by continuous head scanning in the main scanning direction are not adjacent to each other. When R is constant, if the k is different, the nozzle spacing D of the recording head is D = kR
Therefore, the larger k is, the larger the nozzle interval becomes. For this reason, the larger k is, the easier the manufacturing of the recording head is. On the other hand, the head is longer than that of the head having the same number of nozzles, which makes it difficult to downsize the apparatus. . The optimum k must be determined in consideration of the head manufacturing capacity and the size of the apparatus.

Considering a case where the head nozzle spacing D is constant, the recording dot spacing R is R = D / k. Therefore, by scanning the recording head under two conditions of different k, continuous recording is possible. The recording heads formed by the above head scanning can change the recording dot interval, that is, the recording dot density, while maintaining the condition that they are not adjacent to each other.

In the above embodiment, the case where the nozzles of the print head are arranged in one line in the sub-scanning direction has been described, but the present invention can be applied to the case of a print head having a plurality of lines of nozzles. FIG. 4 is a view of the nozzle surface of the recording head,
Fourteen nozzle rows, each consisting of seven nozzles 16 arranged in the sub-scanning direction 18, are arranged in the main scanning direction 17. In the case of such a recording head, the main scanning direction 17
When the nozzles are viewed from, the distance between the adjacent nozzles in the sub-scanning direction 18 is the nozzle distance D described above, and the total number of nozzles 28 is N. In FIG. 4, there are four nozzle rows.
The nozzle spacing of each nozzle row is constant at 4 × D, and the spacing between the nozzle rows is also depicted as being constant, but the nozzles were viewed from the scanning direction 17 as described above. In this case, any arrangement may be used as long as the nozzle spacing adjacent to each other in the sub-scanning direction 18 is constant.

The recording head having a multi-row nozzle as shown in FIG. 4 can be used as a full-color ink jet head by changing the ink color for each nozzle row.

In order to perform full color recording, FIG.
FIG. 6 is a diagram illustrating a recording method according to an embodiment of the present invention when a color head using three color inks of yellow (Y), magenta (M), and cyan (C) is used.

In the figure, 20 is a color head, 21 is a nozzle (Y) for ejecting yellow (Y) ink, 22 is a nozzle (M) for ejecting magenta (M) ink, and 23 is for ejecting cyan (C) ink. The positions of the nozzles (C) are shown, and the nozzles are arranged at a nozzle interval D.

The color head 20 moves in the same manner as described in the embodiment of FIG. 1, and the movement from the position 1 in the main scanning direction 24 and the small skip in the sub-scanning direction are repeated and are shown by 1 to 5. A recording dot is formed on the line and then a large skip is performed. However, the large skip amount in this case is different from that in the embodiment of FIG. 1 as follows.

In the case of a color head having such a structure, when the number of nozzles ejecting ink of the same color is Nc, the recording dot interval R, the small skip amount Ss, and the large skip amount S
Similar to the case described with reference to FIG. 1, the head is scanned so that the relationship with d is D = 5 × RSs = 2 × RSd = D × Nc−4 × Ss (Nc = 3). The dots formed by continuous head scanning in the main scanning direction may not be adjacent to each other. In addition, a and b in FIG. 5 are distances between adjacent nozzles that eject different color inks (a is the nozzle (Y) 2
1 and the nozzle (M) 22, b shows the nozzle (M) 22 and the nozzle (C) 23. Although a and b are drawn in FIG. 5 as being equal to D, it is clear that they need not be less than D. More specifically, it can be said that the minimum value of the distance between nozzles that eject different color inks should be smaller than D.

In the above relational expression, the number of nozzles N in the relational expression in the case of FIG. 1 is simply replaced by the number of nozzles Nc of the same color. Therefore, in the case of a color head as shown in FIG. In the condition that dots formed by head scanning are not adjacent to each other, if Dc is the minimum value of the distance between nozzles that eject adjacent inks of different colors, m, n, and k are natural numbers n / k are irreducible fractions m × k−2 ≧ n ≧ (m−1) × k + 2 When there are m, n, and k satisfying the above three conditions: D = k × RSs = n × RSd = D × Nc− (k−1) It can be easily seen that × Ss Dc ≧ D. In actual scanning, after the color head (nozzle interval D) is moved and printed in the main scanning direction, a small skip of the amount determined by Ss is performed. After the above operation is repeated and the color head is moved and printed in the main scanning direction for the kth time, a large skip of the amount determined by Sd is performed. It will be a repeated operation.

By doing so, the time difference between adjacent dots in the sub-scanning direction in the color head also becomes large, so it is possible to prevent deterioration of print quality due to integration of ink droplets. Further, in the recording method of the present embodiment, since the recorded color order is constant as Y, M, and C regardless of the direction during main scanning, there is also an advantage that hue shift due to change in color order does not occur.

[0034]

According to the recording method of the present invention, dots in the sub-scanning direction formed by continuous head scanning in the main scanning direction are recorded so as not to be adjacent to each other. The recording time difference becomes larger than the conventional one. Therefore, even if the scanning speed of the recording head is increased and the recording speed is improved, it is possible to reduce the adverse effect due to the integration of the ink droplets, and it is possible to realize an inkjet printer with high printing speed and high printing quality. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing a recording method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a recording method according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a recording method according to a third embodiment of the present invention.

FIG. 4 is a diagram showing an example of nozzle arrangement of a recording head in an embodiment of the present invention.

FIG. 5 is a diagram showing a recording method according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view illustrating an example of a mechanism of an inkjet printer that realizes the recording method according to the embodiment of the invention.

FIG. 7 is a perspective view showing an example of a recording head used in the recording method of the embodiment of the invention.

FIG. 8 is a diagram showing a conventional recording method.

FIG. 9 is a diagram showing a conventional recording method.

FIG. 10 is a diagram showing a conventional recording method.

[Explanation of symbols]

 1 ... recording dot 2 ... recording dot 3 ... recording dot 4 ... recording dot 5 ... recording dot 6 ... recording dot 7 ... recording dot 10 ... recording head 11 ... ..Nozzle 15 ... Recording head 16 ... Nozzle 17 ... Main scanning direction 18 ... Sub scanning direction 20 ... Color head 21 ... Nozzle (Y) 22 ... Nozzle (M) 23 ... Nozzle (C) 24 ... Main scanning direction 25 ... Sub scanning direction 31 ... Recording head 32 ... Ink cartridge 33 ... Carriage 34 ... Guide shaft 35 ... Belt 36 ... Drive pulley 37 ... Drive pulley 38 ... Motor 39 ... Platen 40 ... Paper pressing roller 41 ... Paper feed roller 42 ... Recording paper 43 ... Main scanning direction 44 ... Sub-scan Toward 45 ... nozzle

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B41J 2/045 2/055 B41J 3/04 101 Z 103 A

Claims (3)

[Claims] 1. A main scan in which a print head for ejecting ink from a plurality of nozzles faces a print medium, and the print head is moved relative to the print medium, and a main scan is performed in a direction perpendicular to the main scan. In the recording method for obtaining the target recording by ejecting ink from the nozzles of the recording head and forming recording dots at arbitrary positions on the recording medium while performing sub-scanning in which the sub-scanning is performed. Is composed of at least two types of scans having different movement amounts, and recording is performed so that dots in the sub-scanning direction formed during continuous main scanning do not adjoin each other. 2. An interval R between recording dots adjacent to each other in the sub-scanning direction of the recording dots, a nozzle interval D between the recording heads, and a small skip that is a first movement of the recording head in the sub-scanning direction. The movement amount is Ss, the movement amount of the large skip that is the second movement of the recording head in the sub-scanning direction is Sd,
The number of nozzles of the recording head is N, m, n and k are natural numbers, n / k is a irreducible fraction m × k−2 ≧ n ≧ (m−1) × k + 2. When there is k, D = k × R Ss = n × R Sd = D × N− (k−1) × Ss, and ink is ejected from the nozzle while moving in the main scanning direction of the recording head. A printing operation for printing on a recording medium and the small skip are repeated a plurality of times, and the large skip is performed after the kth printing operation. A series of operations from the printing operation to the large skip is repeated. The recording method according to claim 1, wherein recording is performed on the entire surface of the recording medium. 3. A main scan in which a color head for ejecting ink of a plurality of colors is opposed to a recording medium, and the color head is moved relatively to the recording medium, and relative to a direction perpendicular to the main scanning direction. In the recording method for obtaining a target recording by ejecting ink from the nozzles of the color head while performing sub-scanning to move the recording dot to form a recording dot at an arbitrary position on the recording medium, R is an interval between recording dots adjacent to each other in the sub-scanning direction, D is an interval between nozzles of the color head for ejecting ink of the same color, and a small skip, which is the first movement of the color head in the sub-scanning direction. The amount of movement is Ss, the amount of movement of the large skip that is the second movement of the color head in the sub-scanning direction is Sd, and the nozzles of the color head that eject ink of the same color Is Nc, and the minimum value of the distance between adjacent nozzles for ejecting different color inks is Dc. M, n and k are natural numbers n / k are irreducible fractions m × k−2 ≧ n ≧ (m−1) ) × k + 2 satisfying the three conditions of m, n, and k: D = k × RSs = n × RSd = D × Nc− (k−1) × SsDc ≧ D, and Ink is ejected from the nozzle while moving in the main scanning direction to perform printing on the recording medium, and the small skip is repeated a plurality of times, and the large skip is performed after the kth printing operation. A recording method, wherein recording is performed on the entire surface of the recording medium by repeating a series of operations from the printing operation to the large skip.