From an old post by Rocketman:
"I've fished steelhead for close to 50 years using roe, & have tried dozens of curing methods over the years. And the best by far for me is 20 mule team borax, which in Can. can be found in the laundry soap section of your supermarket. One box, which only costs $5.00, will last many years. & cure many eggs. It doesn't take long, & is really quite simple.
I separate the eggs from the skiene by using a large spoon so I end up with single eggs. Put the eggs into a flour sifter, & rinse well with cold water, making sure that all blood has been removed. I let them airdry in the sifter for 10 minutes, putting a paper towel under the sifter to remove any moisture. Then put some 20 Mule Team Borax into a clean plastic container(I use a marg. container), put your eggs in, shake so they're coated, then spread them on a newspaper to air dry for 15-30 minutes. I then put them bag into a dried off flour sifter, getting rid of the borax which absorbs the moisture. I then put them into a Mason jar, & pour in some more borax. If you plan to freeze some, I fill the jar with borax & eggs about an inch from the top. Once I put them into the freezer, every 15 minutes I give the jar a shake, which keeps the eggs single, & continue doing this until the eggs are entirely frozen. When you want to take some eggs out to use, this method allows you to take out only what you need, as opposed to thawing out the whole jar, as thawing & refreezing affects the quality of the eggs. It is also important to let the eggs thaw in the fridge, not on the counter."