Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Adam Seychell <a_seychell@...>
wrote:
> thanks for the link. The prices are kind of on the high side. Their 
> £2625 dryfilm laminator was a bit off putting.

I do not think their prices are great but bit of a niche market I
suppose. I checked out a normal cheap laminator from Maplin that I
picked up for £10 a while back. The temperature switches in it have a
window between 110C and 130C I think. They are around that temp
anyway. This film requires 110 - 115C so fingers crossed I should get
away with a normal laminator. If I need to I will build a better temp
controller for it. 

> I couldn't see liquid solder masks on their site. What was the 
> pricing when you were looking at it ?

http://www.megauk.com/screen_printing.php

if you search the page for order code 41-2002 hopefully this will show
you which stuff I was looking at. The stuff costs £51 + VAT and delivery. 

> I'll try my liquid stuff first. Problems I see using liquid mask is you 
> first need to make screen printing frame and buy/make a squeegee too. 
> Mixing would require a 0.1g resolution electronic scale (possibly a $20 
>   eBay pocket scale). A fan forced home kitchen oven could probably do 
> the 75C bake. I'm assuming you'd clean all equipment with developer 
> solution. All this sounds like a lot of hassle. Maybe with a some 
> patients one could get the process down pat. The sales guy said its 
> pretty easy when you get the hang of it.
>

I do think the process is a lot more involved for the liquid stuff but
for some reason I wonder if the results might work out more
intersting. I am not going to use a screen when I do it. LPKF have a
process called ProMask that actually rolls the ink on. I wonder if
something similar can be done. On www.lpkfusa.com there is a video of
how they apply the ProMask stuff. Might help?

I am going to use a nice pizza oven. I picked one up on Ebay for £20.