Has anyone ever washed Old Stitching, that uses unknown threads?
I washed a whole load of my old pieces this morning and found some of my grandmothers mixed in. These are very grubby and stained and I would like to wash them if possible but I am worried about dyes running
Just to give some idea of what I'm working with

the rabbits have some green ribbon running through the grass - everything else looks like DMC or Anchor threads - I reckon this was one of the last pieces my grandmother did
The war celebration piece feels like the central V is some kind of silk, it feels much softer than DMC but could be a satin or a madeira, the rest I think is DMC
The white tablecloth at the top is very soft threads - I assume that could just be handwashed?

again the 2 white pieces are much softer than traditional DMC etc but are the most stained.
The green piece I think is all silks, and the fabric is some kind of linen. And I believe it was glued into frame



Help hive mind!