potash alum

基本解釋

In potash it turns black, but in alum nothing happens until you bring it to the boil, then purple colour comes flooding out.
在碳酸鉀中，它變成黑色，而在明礬中一開(kāi)始卻什么反應(yīng)都沒(méi)有，直到煮沸后紫色都溢出來(lái)了。
The principle and process of producing potassium-nitrogen compound fertilizer and aluminium hydroxide from potash alum are studied. Some problems are solved through the pilot test.
利用四川某含鉀巖石制得的鉀明礬進(jìn)一步制備硫酸型鉀氮肥和氫氧化鋁，從原理、工藝等方面進(jìn)行探討，并通過(guò)中試解決了工業(yè)化生產(chǎn)所出現(xiàn)的問(wèn)題。
I had left some Qian Cao to soak with some alum a couple of days before and when we added potash we got a lovely pink.
前幾天我已經(jīng)將一些茜草浸泡在明礬里，當(dāng)我們加入碳酸鉀時(shí)，得到了一種可愛(ài)的粉紅色。