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Joined: May 2011
Posts: 1,199 Likes: 7
Sidelock
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Sidelock
Joined: May 2011
Posts: 1,199 Likes: 7 |
When I said "plates", I meant the sideplates of the actual gun. My bad.
But I do think the difference in alloys between any test samples (on one hand) and actual gun parts (on the other) will make some difference.
fiery, dependable, occasionally transcendent
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Joined: Dec 2008
Posts: 2,292
Sidelock
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Sidelock
Joined: Dec 2008
Posts: 2,292 |
I don't believe that the steel used for the plates has any bearing on the colour of the action. It's prime purpose is to hold the charcoal against the action and lock plates. Unless someone tells me scientifically otherwise that back plates or packing plates makes a difference to the colours OTHER than just introducing latency into the cooling process.
T Correct Tony, your backing/blocking plates act like a heat sink and retain/transfer the heat to the parts you want colored......and your side panel design also keeps the b/c against the action during the quench drop.... Cheers,
Doug
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Joined: Jul 2010
Posts: 1,284
Sidelock
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OP
Sidelock
Joined: Jul 2010
Posts: 1,284 |
Actually I'm coming round to my own conclusion that with most of the English guns I've done dated between 1860-1920 the main things that effect the colour are:-
- Mix of charcoal bone to wood
- Temperature, critical, 723 Degrees C
- Length of hold for 723...although this mainly drives colour depth not the colours themselves
- Contact of charcoal to the metal and retaining that contact through the quench
- Blocking of parts with back plates beneath each piece that needs to be coloured.
- Temp of water and good aeration
That's it...those are the main drivers...and if I stick to the basics I can get colours across all metal constructs I've worked with so far.
T
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Joined: May 2011
Posts: 1,199 Likes: 7
Sidelock
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Sidelock
Joined: May 2011
Posts: 1,199 Likes: 7 |
fiery, dependable, occasionally transcendent
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