1, the normal old-fashioned rice flower is 0.62-0.65, and the first pot is 6.5, which is better. After the second pot, the air pressure is basically 6.2, which is very good. Fine-tune it according to different machines. Popcorn generally takes 0.7 to 0.8 breath to step on. China old-fashioned popcorn machine is an ancient popcorn machine. The loud bang of popcorn is an interesting memory of many China people born in 1970s and 1980s. The pressure of popcorn machine can explode soybeans, sweet potato chips, corn and potato chips by 0.6-0.7, mung beans, red beans and most beans by 0.7, and rice, millet and sorghum rice by 0.8.