HueblerHuastler, your recipe is just the same I got to utilize upon reading some threads re milk duds. I used to treat Triangles with milk, then I changed to half and half to get more fat (I don't know if it means more caseine also, I just did this way).
I've never met anyone mention lactose free milk and it influencing tips integrity, could you tell more on that, how did you come to such conclusion?
But as I've seen mineral spirits mentioned along with milk, etc., I use this method more often. Soaking tips in spirits also makes the fibers glued together while pressing them. The benefit of spirits is that they don't "expire" as soon as milk does. Basically, with milk I can prepare a couple of tips, then the solution goes to drain. So I have to take more 24 hours to prepare another couple. With spirits I put two dozens into a can and I don't have to wait until a tip soaks. When I need to have a tip pressed I just take one out and it goes into a press right away.
That said, MILK duds are great, but spirits duds are faster and less messy to make
All that of course provided I have nowhere to bake the tips before pressing. And that's another benefit of spirits, as I don't think baking spirits soaked tip is a good idea, LOL.