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Old April 11th, 2012, 08:33 PM
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jtdoom jtdoom is offline
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Join Date: Jun 2001
O/S: Windows 8 Pro
Location: Belgium, East Flanders
Posts: 5,990
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 before 'burn' (the discoloration of it shows the temp, it cooks to dark brown) at T°-max (designed as such.. melt, then cook/oxidize).

the colour of grimbergen is too hot.
The blonde colour triple white chalk cook point, is just at 260
plain white chalk is at 340 or so. (when bending a lead siphon, this was really handy.)

for bending a siphon out of a lead tube, one has critical points. Each U turn had 7 markers.
In one U turn, 5 critical markers, on a 90 degree bend, I coud use 3 critical.

5 or 7, where it gets to be be deformed most, we had to use a wooden mallet to get inside of lead in bend to outside.
We used chalkboard chalk.
most times, just two colours of it.

the visible discolouration point to best mallable, and white with a yellow coat. (all of them chalkboard colourations turned to warning whitish/white before lead would melt.)

In a computer, I would NEVER use this.
just some old tinker (tin-wright in its original meaning) knowledge I picked up in my tinker career.

tips like this gets us away from computing?
sorbet will 2.

Last edited by jtdoom; April 11th, 2012 at 08:37 PM. Reason: tink