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Forum: Hardware April 11th, 2012, 08:33 PM
Replies: 17
Views: 33,855
Posted By jtdoom
chalkboard chalks will discolour above 360,...

chalkboard chalks will discolour above 360, (melting of lead about 380), and mecanic's temperature finder crayons (usually used below 290 centigrade) would add a waxxy mark at least 20 centigrade...
Forum: Hardware March 27th, 2012, 04:29 PM
Replies: 17
Views: 33,855
Posted By jtdoom
old hands that ever wrought a siphon in lead know...

old hands that ever wrought a siphon in lead know the melt point of lead, and how to detect it before it happens..

an IR temp reader is a handy, but costly thing.

but, temperature crayons are...
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