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Olds
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« on: July 19, 2015, 06:05:46 PM » |
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Been asked to show etching brass.
Please remember this is an acid. Read info on the bottle.
Five easy steps
1. Get a bit of clean brass to the shape required and lightly mark on your design.
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« Last Edit: July 19, 2015, 06:30:38 PM by Olds »
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Olds
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« Reply #1 on: July 19, 2015, 06:08:20 PM » |
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2. Paint on design and add lettering using Letraset. Don't forget to paint the back and the edges. What is not covered will be etched.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Olds
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« Reply #2 on: July 19, 2015, 06:14:10 PM » |
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3. If possible add spacers to keep work piece off of the bottom of the etch container (plasticine works well) and place in etchant face down. You can do this face up, it takes longer and it needs to be agitated frequently.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Olds
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« Reply #3 on: July 19, 2015, 06:17:31 PM » |
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4. Check every 15 minutes to ensure lettering is not being undercut or coming loose. When you get to the depth required or lettering/paint is coming off, remove from the etchant and rinse well.
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« Last Edit: July 19, 2015, 06:23:20 PM by Olds »
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Olds
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« Reply #4 on: July 19, 2015, 06:19:56 PM » |
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5. Clean off paint and lettering using white spirit or thinners depending on the paint used.
Simples.
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« Last Edit: July 19, 2015, 06:29:38 PM by Olds »
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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markju
Full Member
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Posts: 210
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« Reply #5 on: July 19, 2015, 06:23:50 PM » |
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Very nice. What sort of paint? Any oil based paint will be ok??
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Olds
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« Reply #6 on: July 19, 2015, 06:37:49 PM » |
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Yes think so. I usually use Humbrol but this time I used a can of car spray paint. It dries faster. Just spray into the lid and use a brush.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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Manky Monkey
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« Reply #7 on: July 19, 2015, 09:38:49 PM » |
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Aah, the magician reveals his secrets.
Where do you find the etching solution Dave? Ebay? Somewhere like HobbyCraft? Expensive? You realise we'll all be trying this now!
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On the last freedom moped out of Nowhere City.
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markju
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« Reply #8 on: July 19, 2015, 09:52:19 PM » |
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Yes there will be a plague of etched brass and copper bits everywhere. Could breathe new life into " come and see my etchings"
I used this solution years ago to make prototype pcbs when I worked at an electrical engineers. Then we had a pen that you could use to mask the bits you didn't want etched.
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Olds
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« Reply #9 on: July 19, 2015, 10:47:19 PM » |
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I get my etching fluid from Maplins.
Etch resist pens are still available, great for pcb's, but found they don't work to well if deep etching.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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minimutly
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« Reply #10 on: July 21, 2015, 09:58:58 PM » |
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Weren't they called "dalo" pens?
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markju
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« Reply #11 on: July 21, 2015, 10:02:19 PM » |
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No idea. I do remember they were quite expensive. That would account for the bollocking I got when I got caught filling in test sheets with one.  |
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