I have to inherited cans of Dektol. Not a typo CAN
But, in fact, the typo is in using 'to', rather than 'two'. For shame.
Ronald, your acknowledgment that the old cans STILL offer untainted developer powder is all too true and is an inferentially striking and justified attack on the 'paper foil' that Kodak adopted in the '70s.
Good, teach your son with full confidence, as, like learning to ride a bicycle, the knowledge that you had previously acquired does not expire. Start with usable negatives, ones that are easy to print. Only after mastering that do you venture into the more difficult ones, using different grades of paper or contrast filters.
At 45, your son is of the more valuable ones just starting, as he has had much time to think about the 'efficiency' of digital and still sees merit within the analog paradigm. There really IS a fascination with doing this and hopefully your son's interest will increase with experience. - David Lyga