[sdiy] Transition to Lead-Free Hand Soldering

Mike Bryant mbryant at futurehorizons.com
Sat Aug 21 12:59:03 CEST 2021


2005 is about when we all stopped using leaded commercially except for aerospace so probably would be the last time anybody wrote a report on it.

-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Adam Inglis (synthDIY)
Sent: 21 August 2021 11:55
To: dh at atoav.com; synth-diy
Subject: Re: [sdiy] Transition to Lead-Free Hand Soldering

The reference you quote is dated August 2005.
It talks about the contribution of tin-lead (SnPb) solder to ozone depletion and acid rain (among other things). Even global warming gets a mention.

I’m not an expert in this field but it sounds more like a PhD pitch than hard evidence? And it does have that modern ring of alarmism…

sorry, maybe I’ve got alarm-fatigue..

(another relatively modern ailment)

A

> On 21 Aug 2021, at 8:24 pm, dh at atoav.com wrote:
> 
> 
> 
> On 21/08/2021 11:01, cheater cheater wrote:
>> Leaded paste is easily available. Unless you're a manufacturer, RoHS 
>> doesn't matter. Less lead will contrary to popular belief not save 
>> the environment or anyone's health.
> 
> So by changing to leaded solder paste I gain nothing but loose the 
> potential to have a process that is RoHs conform (e.g. should I ever 
> sell a small run of my modules)? Why would I do that?
> 
> Also I am not sure what sources you base your conclusion on, but it is 
> certainly not as simple as "it doesn't matter". It is true that 
> lead-free is not automatically better in terms of environmental and 
> health concerns (depending on the question you are asking), however it 
> is certainly worse in most categories that matter to me (see [1]).
> 
> As you can see in that source SnPb has a occupational 
> health-non-cancer impact that is by _two magnitudes_ higher than all other paste variants.
> So if you claim this has no impact on "anyone's health" you are 
> misleading at best unless we are talking about people who solder once 
> a year.
> 
> 
> 
> 
> 
> ---
> 1:
> https://www.epa.gov/sites/default/files/2013-12/documents/lead_free_so
> lder_lca_summary.pdf _______________________________________________
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