I'm puzzled. What do you think is in the lard (which is real lard, by the way). The partially hydrogenated stuff they sell in supermarkets is more likely to cause reactions than home rendered lard from real fat.
Do you mean the lard or the manteca?
The "lard" in stores, as you say, is not real lard, but trans fat. That makes it not useful for me or my daughter.
I'd be fine if I could find plain rendered lard, but I can't.
Manteca can be flavored or unflavored, so I read on the Internets. But all I've found is obviously flavored (paprika is typical, but it could be other things). So I don't dare to use it.
As mentioned above, render on very low heat and you shouldn't have a scent. I only render suet (tallow) and leaf lard (lard), I don't use the other fats - I think those are the fats that tend to get more 'fragrant'.
It's not about the scent. It's about being in contact with a substance that's a known allergen for me or those I'd be making the soap for. Cross-contamination is a problem.
If I don't know exactly what's in a soap, I don't use it, and yeah, that means there's one commercial soap I buy. There are a few crafters I know here who know details of what's in their soap, down to whether the sodium lactate came from corn or beets, so I've bought from them when they had something very plain to offer, but that doesn't happen often.
If I could find the plain pork fat, I'd be happy to render it.
Unfortunately the butchers near me are either Latino and sell flavored manteca, or they're halal or kosher, in which case lol yeah no pork fat there. And grocers, well it's amazing they even know which cuts of meat are which anymore.
I may have to look out of town in a more rural area for a butcher. I just hate to make the drive if I don't have to.