Streamline jade carving expression technique

Abstract

According to the streamline jade carving expression technique, a carving object is decomposed into multiple connected three-dimensional block faces (the thickness is 5-10 times of the traditional three-dimensional block faces), olive needle / triangular needle carving and manual multi-level polishing are adopted, the problems of planarization and beauty appreciation of a traditional technique are solved, and the three-dimensional full and modern simple style is achieved; the method is suitable for themes such as flowers and plants.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of jade carving, and particularly relates to a jade carving performance method based on a streamline block surface structure, which is suitable for jade carving creation of flower and plant themes. BACKGROUND

[0002] In existing jade carving, the performance methods of flower themes mainly include two types:

[0003] Realistic style: taking the reduction of natural flower forms as the core, petal and leaf blades are mostly in thin sheet structures, and the vein textures are finely carved by round ball needles and K needles, emphasizing the "similar shape", but the finished product has weak three-dimensional sense and insufficient thickness, and is limited by natural forms, lacking design sense;

[0004] Freehand style: learning from traditional Chinese painting techniques, focusing on mood expression, but the petal outlines are blurred and the details are simplified, and the modern aesthetic adaptability is low.

[0005] Both the above two methods have a "planarization tendency", which cannot meet the aesthetic needs of contemporary young people for "three-dimensional fullness and simple fashion"; and traditional polishing processes (such as machine polishing and needle auxiliary) are easy to damage the original lines of jade, resulting in stiff lines of finished products. In the currently disclosed jade carving technology, there is no integrated performance method using three-dimensional block surface streamline structure, special tool combination and multi-level hand polishing, and the related technology has the problems of planarization and insufficient aesthetic adaptability. SUMMARY

[0006] I. Invention purpose

[0007] In view of the deficiencies of the prior art, the present application provides a streamline jade carving performance method, which realizes the three-dimensional fullness and modern simple style of jade works through three-dimensional block surface modeling, special tools and hand polishing process, and solves the problems of planarization and outdated aesthetics of traditional methods.

[0008] II. Technical solutions

[0009] The technical solutions of the present application are as follows:

[0010] (1) Block surface modeling process: the object to be carved (such as petal and leaf blade of flowers) is divided into multiple three-dimensional blocks that are connected to each other, and a streamline contour is formed through arc surface transition (arc surface curvature radius 5-20 mm, main block surface 10-20 mm, secondary block surface 5-10 mm); the thickness of each block surface is 5-10 times that of the corresponding part of traditional similar carving works, and the whole presents a visual effect of "thick and full, smooth lines".

[0011] (2) Improvement of carving tools:

[0012] Olive needle (model φ3-5mm) is used to replace traditional round ball needle for block surface foundation contour shaping, and the thick and heavy feeling is enhanced through cambered surface cutting;

[0013] Triangular needle (top angle 30°-45°) is used to replace K needle for hierarchical depiction of block surface junction, and highlight the high-low difference of streamline structure.

[0014] (3) Polishing process innovation: pure manual sandpaper sanding glue multi-level polishing is adopted, and the specific steps are:

[0015] 240-mesh sandpaper initial polishing to remove carving marks;

[0016] 400-mesh sandpaper refinement to reduce surface roughness;

[0017] 800-mesh sandpaper cross polishing to optimize cambered surface smoothness;

[0018] 1200-mesh sandpaper fine polishing to retain the original texture of jade; finally, polishing paste is used to brighten.

[0019] No machine polishing or pin auxiliary is used throughout the process to avoid line damage.

[0020] III. Beneficial effects

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] (1) Aesthetic innovation: breaking through the traditional "realistic / abstract" binary opposition, combining modern abstract design concepts, streamline cambered surface conforms to the contemporary aesthetic trend, and visual recognition is improved.

[0023] (2) Aesthetic adaptability: through 200 surveys of young and middle-aged users (25-40 years old, covering first-tier to third-tier cities, including 30% of art practitioners and 70% of ordinary consumers), 85% of respondents think that the works are "three-dimensional fashion" and "line smoothness"; the research method is online questionnaire combined with physical score (1-5 point system, with an average score of 4.2 points).

[0024] (3) Process advancement: three-dimensional block structure significantly enhances the three-dimensional effect of the work (traditional thickness 1-3mm, the present application 8-10mm, visual thickness increased by 5-8 times); olive needle and triangular needle combination realizes "thick and heavy feeling

[0025] Hierarchical" dual effect.

[0026] (4) Product uniqueness: manual polishing retains the natural lines of jade, avoiding the harshness of machine processing; the finished product gloss reaches 60-70 gloss units, which is 20-30% higher than machine polishing (40-50 gloss units).

[0027] (5) wide applicability: suitable for different hardness of jade (Hetao jade 6-6.5, jadeite 6.5-7.0, South Red agate 6.5-7.0, etc.), which can be stably implemented by adjusting tool parameters.

[0028] 6.5-7.0, etc.), which can be stably implemented by adjusting tool parameters. DETAILED DESCRIPTION

[0029] 1. Flower carving example (take magnolia as an example)

[0030] Design stage

[0031] Draw the three-dimensional block surface structure diagram of the petal, and divide the petal into 3 main block surfaces (outer petals) and 2 secondary block surfaces (inner petals), with the block surface thickness set to be more than 8 mm (traditional petal thickness is 1-3 mm).

[0032] Carving stage

[0033] Main block surface shaping: use an olive needle (φ3-5mm) to cut along the outer petal contour to form an arc-shaped main block surface.

[0034] Use an arc gauge (accuracy 0.01mm) to measure multiple points along the tangent direction of the arc surface, with the maximum deviation ≤0.5mm

[0035] (Traditional thin sheet structure arc surface deviation ≥2mm).

[0036] Layered depiction: use a triangular needle (top angle 30°-45°) to depict grooves (depth 1-3mm) at the block surface junction to highlight the layers.

[0037] Carving tool operation parameters

[0038] Olive needle and block surface angle: 30°-60° (30°-45° when the curvature radius is 5-10mm, 45°-60° when the curvature radius is 10-20mm);

[0039] Feed speed: 5-10mm / min (upper limit for hard jade such as jadeite and South Red, lower limit for soft jade such as Hetao jade).

[0040] Feed speed: 5-10mm / min (upper limit for hard jade such as jadeite and South Red, lower limit for soft jade such as Hetao jade).

[0041] Polishing stage

[0042]

[0043]

[0044]

[0045] Polishing effect standard

[0046] After 1200-mesh fine grinding, the surface roughness Ra value is ≤0.02μm, showing mirror surface light.​

[0047] 2. Plant leaf carving embodiment

[0048] Design stage

[0049] The leaf is divided into two main block surfaces (upper epidermis, lower epidermis) and one secondary block surface (vein), and the block surface thickness is 5 times that of the traditional (traditional 0.5-1mm→invention 3-5mm).

[0050] Carving and polishing

[0051] Tool selection: olive needle (φ3mm), triangular needle (top angle 30°);

[0052] Process parameters: carving angle 30°-45° (smaller leaf curvature), feed speed 5-8mm / min;

[0053] Polishing steps: same as flower carving (240 mesh→400 mesh→800 mesh→1200 mesh), initial sandpaper for juyu material is adjusted to 320 mesh. The polishing paste model for leaf carving is executed according to the 'different jade adaptation parameter table' (e.g. 1 for hotan jade, 1+2 for jadeite), ensuring the integrity of the work.

[0054]

[0055] Different jade adaptation parameter table

[0056]

[0057] BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 It is a traditional flower carving realistic style diagram. The diagram shows the core features of traditional realistic style flower carving, showing the petal shape of the thin sheet structure, and clearly showing the vein texture finely carved by the tool, directly reflecting the creation characteristics of the traditional realistic method "emphasizing shape similarity and restoring natural form".

[0059] Figure 2 It is a traditional flower carving freehand sketch style diagram. The diagram embodies the artistic expression of traditional freehand sketch style flower carving, and the petal outline is in a virtual state, the overall structure is simplified, and there is no clear block surface boundary, which conforms to the style positioning of the traditional freehand sketch method "emphasizing mood and lightening the details".

[0060] Figure 3 It is a main view of the invention's streamlined magnolia. The diagram can clearly observe the specific position and shape of the "main block surface", "secondary block surface" and "groove", and fully present the three-dimensional block surface structure designed by the invention, which can directly reflect the connection relationship between the block surfaces and the overall effect of the streamlined contour. ​

[0061] Figure 4 It is a side view of the streamlined magnolia flower of the present application. The figure can show the curved surface streamline profile of the carved work of the present application, reflect the precision control result of "curved surface deviation ≤0.5mm", and reflect the smoothness of curved surface transition and the process precision level.

[0062] Figure 5 It is a polishing effect comparison figure. The left side of the figure is a traditional machine polished jade carving sample, and the right side is a hand polished jade carving sample of the present application; the left side gloss value is 45 gloss units, and the right side gloss value is 65 gloss units, which can directly compare the difference between the two polishing processes in gloss effect.

Claims

1. A streamlined jade carving technique, characterized by: The object to be sculpted is decomposed into multiple interconnected three-dimensional blocks. These blocks are formed into streamlined contours through curved transitions (curvature radius of 5-20mm), and the thickness of each block is 5-10 times that of the corresponding part in a traditional similar sculpted work. The blocks are sculpted using olive needles (size φ3-5mm) and triangular needles (apex angle 30°-45°).

2. The method according to claim 1, characterized in that: The polishing process involves multi-level hand sanding with sandpaper and adhesive (240 grit → 400 grit → 800 grit → 1200 grit), followed by polishing with polishing compound after 1200 grit polishing.

3. The method according to claim 1, characterized in that: The three-dimensional block surface includes 3-5 main blocks (curvature radius 10-20mm) and 2-3 secondary blocks (curvature radius 5-10mm), with the main blocks and secondary blocks smoothly transitioning through arc surfaces.

4. The method according to claim 1, characterized in that: The arc surface deviation of the three-dimensional block is ≤0.5mm.

5. The method according to claim 1, characterized in that: The groove depth engraved by the triangular pin is 1-3mm.

6. The method according to claim 2, characterized in that: In the manual polishing process, 800-grit sandpaper is used to alternately polish the surface at 45° to the clockwise direction and 45° to the counterclockwise direction, with the center axis of the object being carved as the reference. After polishing with 1200-grit sandpaper, the surface roughness Ra value is ≤0.02μm.

7. The method according to claim 1 or 2, characterized in that: When carving Xiuyan jade (hardness 4.5-5.5), use an olive-shaped needle with a diameter of 2-3mm and start with 320-grit sandpaper.

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