- Joined
- Jan 4, 2021
- Messages
- 2,944
Can't find where I purchased mine, but bought it as "Railroad Chalk" per Guy's recommendation ages ago:Like some others, I had read in Guy Lautard's The Machinist's Bedside Reader about chalking files. After reading several opinion pieces I realized that "chalk" has a lot of colloquialisms including calling soapstone used for oxy/acetylene cutting. So I started research on Wikipedia and learned there are several minerals and mixtures sold as "chalk." With that information I went shopping.
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May have been from Brownells (which it looks like where you got yours). Amazon has it from a number of sellers for a lot less than $1 per piece, but I'll never use up 6 pcs, much less 144! I usually only use it on larger files when taking off a lot of material, not when I'm just deburring an edge.