Homebrew PCBs

Hi Simon,

Thanks for that eBay reference - I hadn't seen that particular seller; it's a lot more expensive but it looks very similar to the Mechanic brand that I've got. I realise that you generally get what you pay for but I  have some other cheap Mechanic brand items - solder paste for one which is really excellent.

Regards,

Bob

--- In Homebrew_PCBs@yahoogroups.com, Simao Cardoso <simaocardoso@...> wrote:
>
> storan4wd wrote:
> > 
> > I think the real lesson I've learned is that the mask is designed for
> > stencil printing only; quick drying isn't a priority as it's not
> > intended to have anything in contact with it when curing. 
> 
> As a side note, did you ever consider that such cheap eBay stuff, sold
> from china, is not even similar to real soldermask?
> 
> It must be repackaged stuff, the eBay seller can say what he wants with
> his package. I don't know to read chinese, but to see what it really is
> you could try google goggles from a camera phone and translate, if you
> have the real manufacture package. EBay sellers say it's uv curing ink,
> but it can just be UV curing EPOXY GLUE.
> 
> But if you look to one more expensive seller (the one who started to
> sell the stuff as soldermask) he has a working method, see item
> 260937497342. He lays a bit of it at pcb center and spread it with the
> mask directly. Expose for some time and them it should require extra
> curing after solvent washing. A couple of years ago i asked him a msds
> or that he just say what could be used as thinner for it. His answer:
> 'this is just chinese crap, no msds/documentation was ever written'.
> 
> You should know that real LPI soldermask is half the money by quantity
> compared to that stuff. 
> 
> BTW (and off topic) Does anyone *really* know what PM or PMA solvent
> is???? I must know (and be sure) to use with real soldermask... :/
>