Exploring the prepress copying process for porcelain artwork

The exquisite porcelain art has a strong artistic appeal that is memorable. The pre-press copying technology of porcelain artwork can make prints as realistic and realistic and vividly show the charm of porcelain art. This article will discuss the prepress copying process for porcelain artwork.

The beauty of the porcelain art is first manifested in the diversity of its modeling curves. In prepress color separation, the high-light dark setting, level curves, sharpness, and graininess of the scanning process should be fully used to make porcelain. The texture, three-dimensional shape and gloss are highlighted.

When scanning porcelain art manuscripts, the scanning resolution is set slightly higher than that of ordinary products to ensure a smooth and delicate texture of the reproduced porcelain. Scanning resolution can generally be set between 320 ~ 350dpi, the standard must be accurate, can not lose the level.

1, high-profile calibration

Chinese porcelain is mostly white porcelain, so it is critical to reproduce the light color and white in porcelain. Through experiments we have the following experiences.

(1) Try to use the full high light level, and on this basis take into account the best brightness of the screen on porcelain.

(2) Extremely high light and no netting, try to separate the highlights and highlights of the layers that require color, highlighting the best points of the extremely high light and the second highest light, and maintaining the high light level.

(3) Neutral white parts that need to represent the color levels, such as white porcelain tires, white clouds, white flowers, etc., are represented by small dots of the three primary colors, and are based on the texture and illumination surface of various white substances, as well as The cold and warm changes that occur as a result of ambient color effects, giving a dot balance value for the three primary colors. The use of three primary colors and small nets to form a neutral white can make porcelain look both white and thick, crystal clear, smooth and delicate, with a strong texture. This not only makes the highlights visible, but also makes the white porcelain colorful, vivid and full of vitality.

2, the dark tone processing

When copying the manuscript of a black porcelain artwork, it is imperative to realistically reproduce the texture and weight of the porcelain itself. The black color should be pure, non-dark, and not cloudy.

Chinese traditional paintings have a special love for black and white. For example, Kangxi blue and white flowers are known to the world as “multicolored blue flowers”. The reason is that although it is blue and green, it has five shades of light and contains a calm, stable, and solemn meaning. .

Blue and white porcelain is one of the most common varieties in porcelain. When it is processed, the relationship between color and tone should be handled. The level can be refined into the extremely high light area, high light area, middle tone area, second dark tone area and dark tone area. test.

Generally, white and flawless white porcelain and blue-and-white porcelain of light and blue color can refer to the data in Table 1 and Table 2 when they are copied before printing. It should be noted that the area of ​​the shade of blue and white porcelain can not be too large, but the color should be sufficient.

Table 1 Level setting when copying white porcelain originals:

Table 2 Hierarchy setting when copying blue and white porcelain originals:

3, the requirements of clarity

In the process of copying, it is necessary to make certain intensity of the image sharpness, that is, to create a visually clear illusion in the level contour boundary and the subtle layer contrast portion to compensate the clarity of the copied image. Based on the principle of virtual light masking, digital sharpening method is used.

(1) Stress amount

The magnitude of this value will determine the edge contrast, which is the intensity of the black and white edges. The strong contrast can make the subtle relief of the image more prominent, so that the subtle levels of the image get a stronger performance. Since the fineness of the porcelain manuscript is abundant and the edges are clear, the value of the emphasis amount cannot be set too high, and it can be within 5 to 8%.

(2) Smoothness

Since the delicate texture of porcelain is the most difficult to express, it cannot be over-sharpened, otherwise there will be graininess, loss of delicateness, and selection of reasonable parameters is important. The function of smoothing is to eliminate small density changes. For coarser originals, smooth and smooth results can be achieved. Generally, 5 to 6 smooth values ​​are preferred.

The sharpness of the porcelain original is set as follows: black edge 6, white edge 6, smooth value 5, main light hole 6, and dummy light hole 5.

4, color correction

The three attributes of color are hue, lightness, and saturation, and these three aspects should be taken into consideration when performing color correction.

When copying a blue-and-white porcelain manuscript, attention should be paid to checking the proportions of dots in the high, medium, and dark and dark portions of the porcelain products in the image to ensure that the colors are correctly restored and that the blue color is saturated and abundant.

If the red porcelain, red glaze, to be pure red, rich, purple, red purple, pan-blue, like a brilliant sunset. When copying before printing, increase the basic color, reduce the opposite color, give the color enough, but not paste.

When copying before printing, in order to highlight the artistic beauty of porcelain and enhance the texture of “white jade and thin paper”, it is usually necessary to add a background color. Generally speaking, using black to set off the smoothness of white porcelain is the most appropriate color combination. Therefore, black or gray gradients are often used as backgrounds in porcelain albums, and the background color should be composed of four-color dots, and care must be taken to maintain them. Do not cast color. The setting of the gray background can refer to the data in Table 3. This background color can better highlight the porcelain body.

Table 3 can refer to the gray background data: