Ms. Smilingcat,
If you want to talk metalworking, that is my primary hobby (since
electronics was lost as my hobby when I started to get paid to do it back in
1973). I have a RF30 mill, and Atlas/Craftsman lathe, homemade drill press
and shaper from my own castings, plus lots of homemade hand tools. But this
is OT so contact me directly. I look forward to hearing from you.
Rick
-----Original Message-----
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of smilingcat90254
Sent: Tuesday, January 08, 2013 8:29 PM
To:
Homebrew_PCBs@yahoogroups.comSubject: [Homebrew_PCBs] Re: photo resist. Slightly different material.
Yes E-bay is cheaper.
At Capefear, cost for 10' x 24" film is $59.00 with S/H I think it was. they
have much smaller size for sampling but it is pretty pricy!! $19 for 12" x
24".
I pay premium over E-bay because I prefer to have a "regular" supplier. It's
the reason I order from DigiKey, and buy Tektronix and HP equipment.
My sample order from Capefear came very prompt. Well packed, looking very
reputable.
I do not care for grey market items or suppliers where you can't trace back.
As a reference of how I view things: Some of my cutting tools are cobalt
steel with TiN coated material. Not some high carbon steel. Tools
themselves, I prefer Dewalt, Bosch, Makita... Prefer it is MADE IN USA or
Germany or Japan and not just the label saying USA/German/Japanese company.
Most recent outburst was over 6-32 tap. Ordered a replacement tap. Broken
one was a cheapie from Craftsman high carbon steel. Flute on the tap was cut
so irregular, one of the cutting surface was less than 1/32" wide.
Replacement is a cobalt steel, TiN coated 6-32 H3 tap from Ghurring. cost is
about $15.00 each.
Been looking for a lathe and mill and I think I'm going to invest in Taig.
Not so hot on Smithy or Grizzly. Both are not that accurate. I used Smithy
and wasn't impresed. Even their technical spec was bit of a yawn.
smilingcat,
--- In Homebrew_PCBs@yahoogroups.com, "Jeff Heiss" wrote:
>
>
> http://www.polymetaal.nl/siteUK/shopukwork/en-gb/dept_183.html
>
>
>
> The price is on the bottom of the page. The cost is 24" x 10' for $78
> (60 Euro). It costs 5.4 times as much as photoresist available on
> Ebay. I computed 5.4x using the resist I purchased which is 8.3" by
> 9.7' DuPont
> MM540 for $14.49.
>
>
>
> Jeff
>
>
>
> _____
>
> From: Homebrew_PCBs@yahoogroups.com
> [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Rick Sparber
> Sent: Tuesday, January 08, 2013 8:40 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: RE: [Homebrew_PCBs] photo resist. Slightly different material.
>
>
>
>
>
> Ms. Smilingcat,
>
> It looks like very interesting stuff. What bothers me is they said
> "affordable price" yet don't list the price. That usually means it
> ain't that affordable. So what DOES it cost?
>
> Rick
>
> -----Original Message-----
> From: Homebrew_PCBs@yahoogroups.com
> [mailto:Homebrew_PCBs@yahoogroups.com
> ]
> On Behalf Of smilingcat90254
> Sent: Tuesday, January 08, 2013 6:13 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: [Homebrew_PCBs] photo resist. Slightly different material.
>
> Some of you have complained that the resist lifts off or gets damaged
> during handling. laying of the transparent image, static electricity
> causing the resist to lift off with the image, vacuum bagging causing
> more surface scratch and so on.
>
> and the use of chemicals.
>
> I just recently ordered a material called puretch from only US
distributor.
> claims that the film is good down to 1 mil resolution provided your
> image is that good.
>
> links to the US distributor: www.capefearpress.com/puretch.html
> youtube videos on the product: www.youtube.com/watch?v=xkGt9nFER1s
>
> another link:
> http://www.polymetaal.nl/siteUK/shopukwork/en-gb/dept_183.html
>
> Developer used is sodium carbonate (do not get it confused with sodium
> bicarbonate which is baking soda)
>
> capefear press has some good information on how to expose without
> creating shadows and the lamp recommended. Good solid information.
> Application at capefearpress is not electronics but rather arcane art
> form. Far more technical than most of us here or using toner transfer
method.
>
> Some advantages: photoresist is protected from handling by a thin
> plastic layer. It is removed when you are ready to develop so that you
> can't scratch or lift off during handling and exposing.
>
> For photoimaging, they also sell stoufer exposure gauge to help you
> get the right exposure.
>
> ------------
> For now I think I have Pulsar toner transfer system working well enough.
> Don't need to use lot of pressure. Too much pressure causes the toner
> to "bleed" on the edges. temperature to melt toner is around 100C
> anything more and the toner becomes too thin and the image "bleeds"/run.
>
> I may still switch over to puretch. Don't need to keep printing images
> for multiple board. higher resolution for use with TQFP with 0.5mm
> pitch. Pulsar is near the limit for 0.5mm pitch.
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and
Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
------------------------------------
Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links