During the Joseon Dynasty (1392–1897), many silk portraits were made of kings and other public officials. Most of these are now lost. Silk canvases are partially transparent, which allows pigments on both sides of the canvas to be seen. Before working with a silk canvas, artists would create several drafts of their portraits on paper, which was made translucent through the application of oil. In this research, a set of three paper drafts for a portrait from the eighteenth century was analysed via X-ray fluorescence spectroscopic data and microscopic imagery to identify the type of paper and pigments used. Using this analysis, along with surviving historic records, comparisons to other historic portraits, and an artistic analysis of the line and colouring techniques, new insights into the process of making these portraits are presented. Novel features of the three sketches are identified. Furthermore, the step-by-step process used to create these sketches is discussed and illustrated using a reproduction that employs traditional techniques and materials.

在朝鲜王朝（1392-1897）期间，许多丝绸肖像是国王和其他公职人员的肖像。其中大部分现已丢失。丝绸画布是部分透明的，因此可以看到画布两面的颜料。在使用丝绸画布之前，艺术家会在纸上绘制几张肖像草稿，并通过涂油使纸变得半透明。在这项研究中，通过 X 射线荧光光谱数据和显微图像分析了一组 18 世纪肖像的三张纸草稿，以确定所使用的纸张和颜料的类型。通过这种分析，结合现存的历史记录、与其他历史肖像的比较，以及对线条和着色技术的艺术分析，对这些肖像的制作过程提出了新的见解。确定了三个草图的新颖特征。此外，还讨论了创建这些草图的分步过程，并使用采用传统技术和材料的复制品进行了说明。