CN113319988A

CN113319988A - Pottery sand blasting carving method and pottery

Info

Publication number: CN113319988A
Application number: CN202110746358.9A
Authority: CN
Inventors: 王伟权
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-08-31
Anticipated expiration: 2041-07-01
Also published as: CN113319988B

Abstract

The invention discloses a pottery sand blasting carving method and a pottery, wherein the method comprises the following steps: shape processing: carrying out image shape processing on an original picture to be engraved to generate a first picture with a specified shape; gray level processing: carrying out gray level processing on the first picture to generate a second picture; half-tone processing: carrying out halftone processing on the second picture to obtain a halftone bitmap; sand blasting and engraving: and carrying out sand blasting carving on the pottery according to the halftone picture. The invention can convert the image to be printed into a halftone bitmap and adopts a sand blasting mode to perform sand blasting carving, thereby carving a fine and vivid carved image like a photo on pottery (particularly purple clay pottery).

Description

Pottery sand blasting carving method and pottery

Technical Field

The invention belongs to the technical field of sand blasting engraving, and particularly relates to a pottery sand blasting engraving method and a pottery.

Background

The carving content of the pottery (especially the purple sand pottery) comprises carving and mature carving, wherein the carving refers to carving on a green blank before firing after the shaping of the purple sand pottery; the step of engraving refers to engraving on the surface of a blank after the purple sand pottery is molded and fired. The carving is generally carried out on the surface of the purple clay pottery by an artist by utilizing a carving knife. The cooking and carving is divided into two types, one is that an artist uses a carving knife to carve on the fired and molded purple sand pottery, and the other is that the artist uses a computer or a sand blasting technology to carve on the purple sand pottery.

At present, the sand blasting carving content of pottery is mainly to decorate calligraphy and simple line type painting on fired purple clay pottery, but the carving process which is like vivid as a photo on the pottery by using a sand blasting technology is not successful at present.

Therefore, a new technology is needed to solve the problem that the photo-realistic engraving on the pottery can not be performed in the prior art.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention provides a pottery sand blasting engraving method and a pottery, which can perform vivid sand blasting engraving on the pottery.

The invention adopts the following technical scheme:

a pottery sand blasting carving method comprises the following steps:

shape processing: carrying out image shape processing on an original picture to be engraved to generate a first picture with a specified shape;

gray level processing: carrying out gray level processing on the first picture to generate a second picture;

half-tone processing: carrying out halftone processing on the second picture to obtain a halftone bitmap;

sand blasting and engraving: and carrying out sand blasting carving on the pottery according to the halftone picture.

As a further improvement of the technical solution of the present invention, in the shape processing step, the specified shape is a circle, a regular polygon or a rectangle.

As a further improvement of the technical solution of the present invention, the second picture is a bitmap or a vector image.

As a further improvement of the technical solution of the present invention, in the step of gray processing, after the gray processing is performed on the first picture, bitmap conversion is performed to generate the second picture.

As a further improvement of the technical solution of the present invention, in the step of performing halftone processing, the step of performing halftone processing on the second picture includes:

and switching the second picture into a half-tone screen mode in Photoshop image processing software to obtain the halftone bitmap, or processing the second picture by adopting a filter tool of a half-tone pattern to obtain the halftone bitmap.

As a further improvement of the technical scheme of the invention, the pottery is purple sand pottery.

As a further improvement of the technical solution of the present invention, the method further comprises a coloring step after the sandblasting engraving step:

and coloring the pattern carved by sand blasting by adopting dye.

As a further improvement of the technical scheme of the invention, the dye is a water-based dye or an oil-based dye.

A pottery having a pattern engraved thereon by the above method.

Compared with the prior art, the invention has the beneficial effects that:

the invention can convert the image to be printed into a halftone bitmap and adopts a sand blasting mode to perform sand blasting carving, thereby carving a fine and vivid carved image like a photo on pottery (particularly purple clay pottery).

Drawings

The technology of the present invention will be described in further detail with reference to the accompanying drawings and detailed description below:

FIG. 1 is a flow chart of the present pottery sand blasting engraving method;

FIG. 2 is a second picture obtained by subjecting the first picture to a gray scale process;

fig. 3 is a halftone bitmap for halftoning a second picture.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The same reference numbers will be used throughout the drawings to refer to the same or like parts.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Referring to fig. 1 to 3, a pottery sand blasting engraving method includes the following steps:

s1, shape processing: and carrying out image shape processing on the original picture to be engraved to generate a first picture with a specified shape. That is, the outline of the picture is adjusted to make the overall shape of the image more beautiful, and a circular or rectangular or regular polygonal picture can be generated to fit the pottery to be engraved. Generally, the bottom of the pottery is flat and round, the first picture can be also set to be round, and a round image can be carved on the bottom of the pottery in future. The pottery can be purple sand pottery.

In one embodiment, the image shape is processed by using Photoshop image processing software, and after the original picture is opened, a frame tool of a toolbar is clicked to make a circular head image, so that a circular first picture is obtained.

The original picture may be a photograph, a photograph of a person or a photograph of a scene, or may be another image.

S2, gradation processing: and performing gray processing on the first picture to generate a second picture, as shown in fig. 2. However, in the engraving process, the light and shade relation can only be formed by engraving, so that after the picture is subjected to gray level processing, only the gray light and shade change, and the subsequent engraving is facilitated. The gray processing is a very common picture processing mode, and a plurality of picture processing software has the function of gray processing even a word picture tool. In one embodiment, the first picture is subjected to gray scale processing by adopting Photoshop image processing software, and a gray scale image can be obtained according to operations of 'image' → 'mode' → 'gray scale'. The second picture may be a bitmap or a vector image. In one embodiment, in the step of the gray processing, the first picture is subjected to gray processing and then subjected to bitmap conversion to generate the second picture, and after the gray processing, an operation is performed on "image" → "mode" → "bitmap" to convert the image into a bitmap, i.e., the second picture.

S3, halftone processing: and performing halftone processing on the second picture to obtain a halftone bitmap, as shown in fig. 3. The halftoning is also performed on image processing software, which may be implemented by a variety of image processing software, such as photo factories or Photoshop, and in one embodiment, is performed using Photoshop.

The change from light to dark or light to dark on a halftone image is represented by the dot area or dot coverage. It divides the image into a number of dots, representing the shade of the color by the different sizes of the dots. When a printed matter picture is observed, the area of the dot is large, and the color is dark, which is called dark tone; the screen dots are small in area and light in color, so that the screen dots are called as bright tones. The halftone dots are distributed discretely in certain space, and the number of the screened lines is limited, so that the hierarchical change of the image cannot realize stepless change like a continuous tone image, and therefore, the screened image is called a halftone image, and halftone images such as screened films and printed images are halftone images. In the method, after the picture is subjected to halftone processing, different dots are formed on the picture, the color is dark, the corresponding dots are large, the color is light, and the corresponding dots are small, so that when sand blasting is performed for engraving, the engraved area of the large part of the corresponding dot is large, and the engraved area of the small part of the dot is small, so that light and shade change is formed on the engraved image.

Wherein, in the step of halftoning, halftoning the second picture has both of the following modes:

one of the modes is as follows:

switching the second picture into a halftone screen mode in Photoshop image processing software to obtain the halftone bitmap, and specifically obtaining the halftone bitmap according to operations of 'image' → 'mode' → 'bitmap' → 'halftone screen'.

The other mode is as follows:

in Photoshop image processing software, a filter tool of a halftone pattern is adopted to process the second picture to obtain the halftone bitmap, and the halftone bitmap is specifically operated according to the sequence of filter "→" filter library "→" sketch "→" halftone pattern ". It should be noted that the Photoshop software version adopted in the present invention is Photoshop 2020, and if other versions of Photoshop software or similar bitmap mapping software from other companies are adopted, the specific steps may be different, but only the similar effect is achieved.

S4, sandblasting and carving: and carrying out sand blasting carving on the pottery according to the halftone picture. The step of sandblasting engraving can be completed by adopting the existing sandblasting engraving method, generally, a picture (namely, a halftone picture in the method) is printed on parchment paper, then a blueprint machine is used for blueprinting, an image is transferred to a sandblasting film, then the picture is washed, the washed sandblasting film is used for wrapping the purple sand pottery for sandblasting, the area without the image is protected and sandblasted and cannot penetrate through for engraving, the area with the image is sandblasted and passes through for engraving to form the image, so that various light and shade changes of the engraved image can be reflected, and the engraving with the photo-like precision is realized.

Further, the pottery sand blast engraving method of the present invention further comprises a coloring step after the sand blast engraving step:

s5, coloring: and coloring the pattern carved by sand blasting by adopting dye, wherein the dye is water-based dye or oil-based dye. In the prior art, laser engraving is also adopted for ceramic, but the temperature is higher during laser engraving, the laser engraving is like burning out with fire, the image engraved on the ceramic is black and is a black piece, and if coloring is carried out, a good image effect is difficult to form due to the black bottom. In the method, sand blasting carving is adopted, wherein sand blasting is to grind the surface of the purple sand pottery by using sand to expose the natural color of the purple sand pottery, and then coloring is carried out, so that a good image effect can be obtained.

A pottery having a pattern engraved thereon by the above method. The pottery can be a water cup, a kettle or a pottery such as a bottle, a pot, a tray, a jar and the like. The pottery can be purple clay pottery.

Other contents of the pottery sand blasting carving method disclosed by the invention are referred to in the prior art and are not described in detail herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The pottery sand blasting engraving method is characterized by comprising the following steps of:

2. The pottery sand blast engraving method of claim 1, wherein: in the shape processing step, the specified shape is a circle, a regular polygon or a rectangle.

3. The pottery sand blast engraving method of claim 1, wherein: the second picture is a bitmap or vector image.

4. The pottery sand blast engraving method of claim 3, wherein: in the step of gray processing, after the gray processing is performed on the first picture, bitmap conversion is performed to generate the second picture.

5. The pottery sand blast engraving method of claim 1, wherein: in the step of halftone processing, the step of halftone processing the second picture is:

6. The pottery sand blast engraving method of claim 1, wherein: the pottery is purple sand pottery.

7. The pottery sand blast engraving method of any one of claims 1 to 6, wherein: further comprising a coloring step after the sandblasting engraving step:

and coloring the pattern carved by sand blasting by adopting dye.

8. The pottery sand blast engraving method of claim 7, wherein: the dye is water-based dye or oil-based dye.

9. Pottery having a pattern engraved thereon by the method of any one of claims 1 to 8.