Homebrew PCBs

Hello,

I read the how to use it instructions, and there appear to be a 
couple of concerns. 

First, it is not clearly stated but it seems that this is NOT 
a "there" or "not there" film. Rather the film is thick enough to 
resist the blast in the non-image areas, but in the "image"(means 
sandcarved) areas, there is still a thin film which must be abraded 
by the blaster. (I say this because they show no step to remove 
any "backing" film at ant point, and also because they recommend 
using a wire brush for fine detail areas, calling it a "membrane 
popper". My belief is that the membrane they refer to is the thin 
film remaining which holds everything together. Because they are not 
affixing the film to the product until AFTER exposure, developing, 
and washout...

Next, the ultimate removal of the film is by placing in water. And 
that part of the instructions says that all their films are water 
soluble...

Based on this, I don't think it will work well for us, if at all...

Ballendo













  

--- In Homebrew_PCBs@yahoogroups.com, "Ben H. Lanmon" <bhleavi@y...> 
wrote:
>  > I have to investigate this more... it looks like a photosensitive
> > film that "develops" in water, and sticks down without heat.
> > 
> > It is made for sandblast etching/carving. But if the hardened film
> > stands up in water, perhaps it could be used for acid etching.
> > 
> > http://www.rayzist.com
>  
> 
> Well price wise it looks like it runs $5.71/sheet for 25 sheets 
upto 
> $6.90/sheet for 5 sheets.
> 
> Did not see anything about how it stands up in water, they use 
water 
> to wash it out after exposure.  Don't know what it does once it has 
> dried.