|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc. |
  |
|
|
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
 |
|
|
Thread Tools | Search this Thread |
16th September 2006, 02:27 PM
|
#2 |
|
diyAudio Member
Join Date: Sep 2004
Location: Adelaide, Australia
|
I buy mine from a hardware store.
__________________
http://sites.google.com/site/quasisdiyaudiosite/ |
|
|
16th September 2006, 03:48 PM
|
#4 |
|
diyAudio Member
Join Date: Nov 2005
|
Nord,
It also goes by the name of Lye (sodium hydroxide). It is also the primary, and often the only ingredient in powdered drain cleaner... white crystals. Be reasonably carefull with that stuff... DEFINITLEY cover your eyes. It can react with many things violently... make sure your are following a procedure. 
|
|
|
|
16th September 2006, 05:16 PM
|
#5 |
|
diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
|
Sodium Hydroxide is used to "develop" the photo-mask, not to etch. A solution of a few percent by weight is usually enough.
We'll reiterate Poo's comment -- wear goggles when pouring and mixing the crystals into water. For etching I use drugstore brand (dilute) hydrogen peroxide along with a bit of muriatic acid. Don't bother getting stronger versions of the H2O2 -- it's difficult to store and very reactive. |
|
|
|
16th September 2006, 05:24 PM
|
#6 | |
|
diyAudio Member
Join Date: May 2001
Location: Norway, -north of the moral circle..
|
Quote:
12 grams to the liter is the strength for the boards I get , from different manufacturers............... |
|
|
|
|
16th September 2006, 08:29 PM
|
#8 |
|
diyAudio Moderator
|
Just as important as goggles: sturdy rubber gloves. That stuff will turn your hands into soap.
__________________
“Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache |
|
|
|
16th September 2006, 08:43 PM
|
#9 |
|
diyAudio Member
Join Date: Apr 2004
Location: Gütersloh
|
Yes, this stuff is REALLY ugly agressive... It tends to destroy any organic material. (like skin) I already had the fun to have that in melted consistence in my face... I actually heard the etching... My friend told me that he never before saw a human run that fast.
Okay enough warnings to handle that stuff with care... To your question, Nordic, shops selling PCBs with photoresist typically also sell the developer needed. You do not need much, not enough to dissolve yourself. It won't help you, i have 1Kg left... Mike |
|
|
|
17th September 2006, 03:27 PM
|
#10 |
|
diyAudio Member
Join Date: Sep 2005
|
Thank you all, I managed to get a packet at the hardware shop, nice and cheap... its flakes (i was expecting balls after reading some websites).
Also I didn't see any of the warnings until now, but I managed to safely mix use and dispose of the developer.. Just treated it like satan's sperm... will put my woodwork googles and mask on next time then... Stored the dried flakes in a bag in a metal tastic rice tin with a tight lid so the cats can't get to it... |
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Using a Spoon to measure Caustic Soda?? | yehuda | Parts | 1 | 19th September 2005 06:31 AM |
| New To Site? | Need Help? |
| Page generated in 0.10003 seconds (75.86% PHP - 24.14% MySQL) with 10 queries |
Where do I buy caustic soda
