《农桑辑要·蚕事预备·生蚁》
做到这一点的方法是：蚕卵已经全部变为灰色时，将每两张蚕连面对面地合起，铺在一张干净的空箔上，把箔紧卷起来，两头用绳子捆好，竖立在没有烟气的干净的凉房中。
其法：变灰色已全，以两连相合，铺于一净箔上，紧卷了两头，绳束，卓立于无烟净凉房内。
The method to achieve this is: when all the silkworm eggs have turned gray, combine every two silkworm eggs face to face and spread them on a clean empty scaffold, roll the foil tightly, tie both ends with a rope, and erect it in a clean and cool room without smoke.