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Old 25th October 2013, 09:54 AM   #371
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To mee ,it wont be expensive, I have the frame at work A4 size.
But it is a quite simple job,I think.
Good for a large series.

Bernt

Last edited by båndsei; 25th October 2013 at 10:04 AM.
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Old 25th October 2013, 10:11 AM   #372
solhaga is offline solhaga  Sweden
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Quote:
the frame at work A4 size
Yes, but it should be possible to have half a pattern and then flip it around for a second printing.
Or have two screens.
Or have a generic "middle" pattern that can be repeated and then apply the terminals using tape.
Or ...
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Old 26th October 2013, 07:09 AM   #373
solhaga is offline solhaga  Sweden
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Couldn't the photo emulsion (for example AQ-1) used to make the screen originals be used directly on the alu?

Some kind of preparing the alu surface must perhaps be done, but should also be the case when doing the actual screen printing to the glossy alu surface.
Perhaps it adheres better to the alu than the emulsion used for circuit boards (it for sure seems to be a lot cheaper).
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Old 26th October 2013, 08:07 AM   #374
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My diaphragms are 160X245mm before folding,and can be made on a A4 frame.
I am not sure the fotoemulsion can withstand the acid I use : HCL.
I might be able to get prints from a printer at the workshop.Ihave seen it print large Pictures,on a roll of photopaper.Perhaps 100cm wide .

Bernt
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Old 26th October 2013, 11:56 PM   #375
ilardi is offline ilardi  United States
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Have you tried this aluminum etch: http://www.uic.edu/sph/glakes/harts1/HARTS_library/Semenoff.txt ?

I don't know if it attacks toner but it works very well with photoresist.
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Old 27th October 2013, 07:09 AM   #376
ds23man is offline ds23man  Netherlands
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Quote:
Originally Posted by båndsei View Post
Solhaga, then I am am nerd to.
I have been able to buy a small quantity of alu/mylar.50 meters of 7my alu/15my mylar. 180mm wide.
[IMG]Click the image to open in full size.[/IMG]
I have tried to print directly on the alu/mylar,but it cant resist the acid.It does not disolve the print .But the print losens,and drops off in pieces
I will try another printer.
Looking at the Teinuro AMT magnetsystem, it seems that there is a gab in the middle of the system.Try to simm that too.

Bernt Båndsei.
Where did you get the foil???????
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Old 27th October 2013, 09:56 AM   #377
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Ilardi,I had seen it ,but forgotten it Again.
Thank you.I will try to get some coppersulfate.

Ds23mann.
I got it from China,and I think it would spoil my chances of reordering,if i shared the name.
They dont sell in small quantaties,less than 100-1000kg.

I would like to send you a sample,and maybe sell some if others want to buy.

The thickness 7/15 my is a "common" size.

Bernt.
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Old 28th October 2013, 07:04 PM   #378
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I have tried to etch with this http://www.uic.edu/sph/glakes/harts1...y/Semenoff.txt
It Works fine.Does not disolve the toner.It creates copper,easy to remowe:
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]

Bernt

Last edited by båndsei; 28th October 2013 at 07:08 PM.
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Old 28th October 2013, 07:15 PM   #379
solhaga is offline solhaga  Sweden
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Good work!
Congratulations!
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Old 29th October 2013, 06:36 AM   #380
ds23man is offline ds23man  Netherlands
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Nice, how do you get the toner of?
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