Chiu declares: "When you heat asphalt, it has a thick and gooey liquid consistency that is hard to control but also allows for greater possibilities." When the asphalt cools, it becomes a solid, and it will only melt upon exposure to extremely high temperatures. Thus you must paint when the asphalt is hot, keeping a pot of it bubbling on a burner as you apply it to the canvas.
「柏油經過加熱後，具有黏稠的流動性，較難掌握，卻也意味著更多的可能性，」邱錫勳表示，柏油冷卻時是固體，須在高溫加熱下才能融成液體，這也意謂著畫家需在高溫下，一邊以瓦斯爐煮柏油，一邊快速作畫。