# Cheap and good PCB etching solution.....

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##### New Member
I used permanent marker (sharpie)

It works great if you have 2:1 Mixture, but dont experiment with different values. It works best.

#### joseph@e-tech

##### New Member
Hero999 said:
Heck, I use photo resist board for real PCBs, it doesn't work out that expensive, it's probably cheaper than Press-n-Peel.

It's easy to build a UV exposure, the cheapest way is to lay your board with the artwork on top on a table held down with a peice of glass. Use compact black light for the UV source, the easiest way is to put it in an old desk lamp and direct the beam at your PCB.

http://www.maplin.co.uk/Module.aspx?ModuleNo=33124&criteria=UV&doy=25m8

I know there are probably cheaper places to buy these from and don't use the incandesant type they're crap and don't last for very long.

Look, here are some cheaper alternatives:
http://www.blacklight.com/items/FTBPESL13T-BLB
http://www.bulbman.com/index.php?main_page=product_bulb_info&cPath=4351_8839&products_id=11675 - needs a holder with ballast though.
http://www.doityourself.com/invt/0307207
do you use that UV lamp for presensitized pcb? i don't think a black light can develop the presensitized pcb

#### kasamiko

##### Member
What is the common commercial name for Hydrogen Peroxide?

TIA

#### mneary

##### New Member
I've never heard any other name. Wikipedia lists:

μ-1κO,2κO’-Dioxidodihydrogen
Dihydrogen dioxide
Hydrogen dioxide
Dioxidane

#### kasamiko

##### Member
Can i used the one that is used as wound disinfectant?

#### 3v0

##### Coop Build Coordinator
Forum Supporter
I know this is a reply to a rather old post.

Instead of laser labels I use 3M blue painters tape. It is less gooey.

Pulsar transfer paper is very good but it may be hard to find outside the US. It has a starch coating that disolves in water. If your laser printer can print it, it will end up on the PCB. Neat stuff.

#### Mike44

##### New Member
I've heard (or read) from some people that standing up the board vertically in an etch tank versus laying it down flat makes it go quicker? Just a myth or reality? I could understand that when the board is vertical, maybe the dissolved copper would 'sink' to the bottom keeping the etchant more pure around the PCB. I suppose a bubbler would just fix this problem though?

And also, I just have a question about waste disposal of muriatic acid and H2O2. I'm pretty sure that if it's toxic to breathe, it definately is not safe for a septic tank. Any suggestions? I do have access to my Chemistry lab at my University, so maybe I could bring the stuff there, since they usually have a ton of inorganic waste. Don't know how happy they would be though lol!

Mike

#### Wond3rboy

##### Member
I like your cheep etching solution.

Press-n-Peel is a waste of money, I just use ordinary magazine paper. Just print your circuit onto it, iron to a clean piece of copper clad board and wast it off with water.
Hi Hero999,

i wanted to know if i get you correctly: we can use a common magazine paper to get our ckt from the printer to the PCB board?I ask this because TTP is not available in my city easily.

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