I'm interested to make my own variable sepia toner.
It appears that it is not possible to send Thiocarbamide nor Sodium hydroxide by mail from B&H to Canada. It is just possible to pick up at the store.
So, is there an interdiction to put these products in mail or it's an interdiction to ship across the canadian border?
It is strange because I can buy the products already <<mixed>>.
Another option is Photographers Formulary. They won't/can't ship via USPS to Canada, but they will ship via UPS. I recommend checking with UPS for cost because it can be expensive.