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Subject: Re: Explosive Byproduct: what are the risks with muriatic acid?

From: psykhon@...
Date: 2011-12-30

By guessing your level of knowledge on the matter, I would recommend that you shoul be more carefull with the chlorine gas that may be released from the etching solution, please wear a gas mask with appropiate filter for chlorine gas, if you cant get a chlorine filter, any carbon activated filter will be better than nothing, just replace it more ofther. Also make the mix, etch, and store the solution in a well ventilated area, and do not close the container too tigth, there are some gasses that keeps going out of the solution once bottled.

Final advice, DO NOT THROW IT ON THE DRAIN, first it can be regenerated indefinitely and seccond, copper leads to malformation in fish gills.

Please do not be scared with all of this, cucl is the best etch out there, more and more pcb manufacturers are converting to cucl because its clean, cheap,reusable, you can get very precise lines and more important fact: ECOLOGYC



--- In Homebrew_PCBs@yahoogroups.com, "poofjunior" <seeifyoucanmeetme@...> wrote:
>
> Hello, fellow PCB makers,
>
> I'm new to the etching community, and most of my learning has come
> either from here or other places online.
>
> I've made 3 successful boards so far using the Toner Transfer method and
> Muriatic Acid with hydrogen peroxide, but I'm worried about a critical
> step:
>
> After removing the etched board from the etching solution, I dried it
> with a paper towel and then cleaned it with acetone. Am I at risk of
> creating small particles of the friction-based explosive Acetone
> Peroxide because I didn't first rinse the etched board with water?
>
> Without knowing about this accidental byproduct beforehand, I've already
> soldered components onto the board and added a layer of epoxy to the
> bottom as a sealant.
> Because this board is going to have to take a lot of vibrations (it's a
> quadcopter controller board), should I trash it to e-waste and start
> over?
>
> Lastly, has anyone had any bad experiences in accidentally making
> acetone peroxide on their PCBs using HCL, H2O2, and Acetone?
>
> Thanks everyone!
>
> Sincerely,
>
> Poofjunior
>
>
>
> [Non-text portions of this message have been removed]
>