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Marshal,

Good Jnats are like women, if you try to correct them too much they hurt you. Lol.

Cheers, Steve

I think 'toxic' is a way to say that an inclusion can scratch steel versus an inclusion that doesn't.

Most glassy lines and goma are not toxic, these inclusions can add silica and cutting power to...

That's exactly right, and the video of Ilzuka-San finishing his Shigefusa knives which can sell for well north of a kilobuck is a good example of function trumping toxicity. The karasu barber hone...

Absolutely Richard, and I am remiss for not mentioning that. Fiberglass fragments are sharp and can cause a lot of problems if gotten into clothing or especially eyes. Work over a sink, outside,...

I hope the post is useful. BTW, the fiberglass brushes are great for cleaning out the pitting or surface rust on old razors before a light coat of Ren wax to keep the pits from rusting again. Just be...

Me? No, voids are 'below the surface' so no reason to fill them. I just make sure the edges are stable.

Cheers, Steve

A fiberglass brush image and glassy lines so bad they can tear up a kitchen knife. And a small bias crack.

Cheers, Steve

Toxic Features and Solutions for Jnats

Regular cracks (vertical or nearly vertical to the honing surface) are usually not toxic. Any sharp edged defect or depression can shed particles, so I dress...