作者黃運祥三十多年來完成了數千幅的水彩寫生，有感於純透明水彩顏料較適合四開以下之畫作，二開以上之大幅畫作，若以純透明水彩顏料施作，總嫌單薄，故二開以上的大幅畫作，作者乃嘗試將水彩顏料混入建築及化工材料，在矽酸鈣板上作畫，在無數次的失敗裏終於找到答案，建築及化工材料經多次流動混色重疊施作，既可渲染亦可厚塗，其呈現之效果不亞於油畫之厚實，又具水彩畫之渲染迷灕，所以作者的水彩畫可說是兼具了水彩及油畫之特性。
　
For over 30 years, the painter Yun-xiang Huang has completed thousands of watercolour paintings in the approach of capturing from life or nature. Although paintings whose size is equal to or smaller than quarto or equal to or bigger than folio are more suitable for pure and transparent water colour paint, he thinks it seems very light if a painting is made with pure and transparent water colour paint. Therefore, he has tried to make large-sized paintings of better than folio by mixing water colour paint with architectural and chemical-industrial materials and applying them on calcium silicate boards. After many failures, he finally realized that if architectural and chemical-industrial materials are flowed, mixed and overlapped many times, embellishment and thick painting can be achieved. The result is as good as oil paint or even better. Such an arrangement will help paintings look somehow ambiguous, having mixed features of watercolour and oil paint.