Gold Leaf: Cooking the Gold Size
贴金：金胶（金箔胶）熬制
标签：金胶, 清漆基, 熬制, 粘接力
传统金胶以生漆或桐油加松香、熬制的清漆为基，薄涂于器物待"指触干"（不粘手但微粘）再贴金，称"二成干"。现代用丙烯酸或聚氨酯金胶更可控。胶层过厚会泛黄、过薄不粘；环境湿度 50–60%、无尘，是贴金成败关键。
Traditional gold size is a cooked varnish of raw lacquer or tung oil with rosin, brushed thin and left to "tack"—dry to touch yet slightly sticky (the "second-stage dry")—before laying leaf. Modern acrylic or polyurethane sizes are more controllable. Too thick yellows, too thin fails to grip; 50–60% humidity and dust-free air decide success. ---