基于明度渐变的静物

这是一幅综合媒材作品，融合了多种技能与知识内容。首先，我们学习如何用丙烯或蛋彩颜料绘制明度渐变，以此作为本幅静物画的背景。在画纸上画出12条色带（每条宽2厘米）。每一条色带均需涂绘渐变中更深一级的明度，从最浅者开始。调色盘上需备好三种颜色：白色、一种你喜欢的颜色（例如蓝色）以及少量黑色。

先取白色，加入极少量蓝色，用此色调涂绘第一条色带；接着，逐条向下，在每条色带所用颜料中再添入微量蓝色，持续推进明度渐变，直至仅使用纯色为止。若要将明度渐变延续至第十二条色带，则需在后续步骤中不断加入微量黑色，使颜色逐级加深。

第二项任务是在另一张画纸上用铅笔勾勒静物各物体的轮廓。为确保造型对称，可为每个瓶子画出一条对称轴线。先画出花瓶或瓶子顶部与底部的两个椭圆——这两个椭圆须严格对称。再由上方椭圆向下方椭圆画一条连线，即完成瓶子一半的轮廓；随后依此轴线绘制另一半，特别注意整体形状的对称性。最后，用铅笔在这些物体上画出形体阴影。为贴合瓶子的曲面，可尝试以条状方式分段绘制阴影，会更易把握。

完成这幅综合媒材作品的最后一步，是将瓶子剪下，并粘贴到明度渐变背景画面上。最后一步是在瓶子所置的表面上画出投影。投影能增强画面真实感，并赋予静物以纵深空间感。

Still life on tonal gradations

Here we have a mixed media work that involves many skills and subjects. First off all we learn how to paint a tonal gradation with acrylic or tempera painting, in order to create a background for this still life. You draw 12 stripes on a drawing sheet (2 centimeter each). Every line should be painted with a darker tone of the gradation, starting from the lighter one. On the palette you prepare three colors: white, a color you like (eg. blue) and a little amount of black.

You start with white and you add a very little amount of blue; paint the first line with this color. You proceed adding a small amount of blue for every line below and you carry on your tonal gradation until you have only the pure color. In order to proceed with tonal gradations until the twelfth stripe, you need to add small amounts of black to darken the color more and more.

The second task is to draw the objects of the still life with a pencil on another drawing sheet. In order to create symmetrical shapes you can draw a line of symmetry for every bottle. You start with the two ellipses on the top and on the bottom of your vases or bottles: the ellipse must be symmetrically correct. You draw a line from the higher ellipse to the lower: you have drawn half of the bottle. Now you can draw the other half, paying particular attention to the symmetry of the shapes. On these object you draw the form shadow with a pencil. It could help to proceed drawing the shadow in stripes, in order to follow the curved shape of the bottles.

To finish this mixed media work the bottles have to be cut out and glued on the painting with tonal gradations. The last step is to draw the cast shadow on the surface where the bottles are placed. The cast shadow makes the drawing more realistic and gives the sense of depth to the still life.

色调渐变的静物

基于明度渐变的静物

Still life on tonal gradations