Sketching an Office Chair

You can refer to the following steps to sketch an office chair:

Step 1: Determine the Outline
First, draw a horizontal straight line on the paper to serve as a reference for the ground. Use this line to determine the general outline of the upper and lower parts of the chair. Pay attention to the overall proportions to ensure that the upper and lower structures match the actual shape of an office chair.

Step 2: Depict the Soft Texture
If the office chair is made of leather, use curved lines to show the softness of the edges. Both the outer and inner contours should be drawn with curves to avoid rigid straight lines, reflecting the stretchability and wrapping nature of the leather material. For example, the connection between the backrest and the seat cushion should be smoothly transitioned with curves.

Step 3: Draw the Armrests and Base
The armrests can be simplified into modified rectangles and drawn according to perspective, with larger sizes in the foreground and smaller sizes in the background. The base consists of five metal legs connected to wheels. First, draw the legs on the left and right sides, then add the three middle legs, paying attention to the perspective shortening and overlapping relationships of the front and back legs. The connection points of the metal legs should be depicted with firm straight lines to show structural integrity.

Step 4: Lay Out the General Dark Areas
Use a soft pencil (such as 5B) to draw the general dark areas of the entire office chair based on the direction of the light source. Dark areas are usually concentrated on the inner side of the backrest, under the seat cushion, and on the shaded sides of the metal legs. Use a consistent direction of hatching to represent the logic of light and shadow.

Step 5: Deepen the Tone and Details
Use a 7B soft pencil to intensify the overall tone of the leather sofa, focusing on depicting the color layers of the wheels and the connection points between the legs and the chair. The dark areas of the leather should show softness through naturally transitioned turning surfaces, while the gray areas should be subtly treated to create a clear contrast between black, white, and gray. At the same time, leave reflective areas at the joints of the leather sections on the sofa.

Step 6: Enhance the Texture Representation
Use a 6B soft pencil to further depict the texture of the leather surface and the armrests, strengthening the reflective effect at the joints of the sofa layers. The metal legs should show their reflective nature through the contrast between highlights and reflections. The position of the dark areas should be determined according to the light source. The contrast between the gray and dark areas should be stronger than that of the leather parts, and the highlights should be small and sharp.

Step 7: Harmonize the Tone and Contrast
First, lightly smudge the dark and gray areas with a paper stump, preserving the highlight and reflection areas to make the tone more harmonious. However, the tone will weaken after smudging with the paper stump, so use a 6B pencil to deepen the contrast between the dark and gray areas again to ensure a clear contrast between black, white, and gray. The highlights on the metal legs should be brightened with an eraser or left white to highlight their reflective properties.