How to pronounce “lampblack” in English

And then he would use these pipes or these tubes, he would use them as crucibles.He would fill them about 2/3 full of what he called a paraffin spirit, bone oil mixture, and would add in four grams of lithium, a pinch of lampblackfor the carbon because you need the carbon, and then would heat them to a dull red heat for 14 hours, and then set them aside to cool.