Homebrew PCBs

I'm confused about the need to warm etchant.
I use 100 ml store bought hydrogen peroxide (30% peroxide and 70% water) 
with 50 ml of storebought muriactic acid
which is 70% water......
and my etch time has never been longer than 5 minutes at room temperatures.

What does heating etchant gain you?




On 10/08/2016 01:10 PM, 'keith printy' keethpr@... 
[Homebrew_PCBs] wrote:
>
> When we used to etch boards at work with the ammonium persulfate we 
> used a corningware like an oven safe pan and put it on a small 
> electric hot plate. The etchant will pit the pan but it took a long 
> time before it did.
>
> For ferric chloride a friend of mine used to warm it in the microwave 
> then etch his boards.
>
> *From:*Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com]
> *Sent:* Saturday, October 08, 2016 12:48 P M
> *To:* Homebrew_PCBs@yahoogroups.com
> *Subject:* [Homebrew_PCBs] Re: Heater for Etchant Bath
>
> Another glass fish tank heater user here, though I've switched to 
> mostly muriatic acid/hydrogen peroxide. My only real complaint is that 
> it's got a "minimum fill" line, so I have to make a giant batch of 
> etchant no matter what size board I do. I often end up not using the 
> tank to do smaller stuff because of this. My tank is also flat (looks 
> like an ant farm box), so it would be even worse if it were larger.
>
> Good luck on it!
>
>