when i had silkworms turn into moths, I would place mating pairs in 3.5oz cups with paper towel under the lid and flipped it upside down into a mating chamber. Once they "disengage", I remove the male (feed him off if no more females need him) and leave the female to lay her eggs. Once she lays her eggs, she'sremoved, fed off, and the eggs are left out until they turn grey. The "pod" is then placed in the refrigerator for diapause. The little container then makes for a nice incubation and hatching chamber once they've been removed from the refrigerator after about a month or longer(I think?). I don't know how long the eggs can be kept without hatching being affected.
I might want some silkworm eggs if you happen to have any extras. My last batch didn't do well and died off when feeding chow. I don't do well with the chow, but the mulberry trees are getting leaves and I might want to try them again.