"Disappearing" tailor's chalk

[Barb T]

I worry a bit about what chemical is in the "disappearing" chalk (iron-out) and what its effect over the long term might be on tartan. If I were making a garment that would be worn for a few years and then given to Good Will, I wouldn't worry. But, a kilt may be handed down from person to person, and, given the fact that regular clay, dust-off (wax-free) chalk works perfectly well and isn't hard to find, I'm not willing to risk using the disappearing stuff.

[sydnie7]

I worry a bit about what chemical is in the "disappearing" chalk (iron-out) and what its effect over the long term might be on tartan. If I were making a garment that would be worn for a few years and then given to Good Will, I wouldn't worry. But, a kilt may be handed down from person to person, and, given the fact that regular clay, dust-off (wax-free) chalk works perfectly well and isn't hard to find, I'm not willing to risk using the disappearing stuff.

Hadn't thought of it from that perspective (although my kilting attempts are unlikely to become heirlooms ).

I still think the "black light" stuff has possibilities. . .