On Tue, 2009-06-16 at 09:20 -0400, Myc Holmes wrote:
> It seems a bit expensive for some UV curable paint $15 for 1/3 of an
> ounce,
I could not stop thinking about from what is made that soldermask. So i
asked the seller gently.
(my question)
hi, i was looking for soldermask and... found yours! But, sorry for
asking this, i am not convinced yet, soldermask are normally epoxy, and
yours seems to behave different. If the powerful lamp heats the board
all the epoxy will be cured.
Are this just part A epoxy (resin) with silkscreen sensiblizer? Or other
type of ink with sensiblizer? I ask because i have to know how long it
will last, if i can use it in various boards or if only has few days
self live. The necessary conditions for storage (light, temp, humidity).
Etc. Sorry if am asking to much. Very thanks, Simao
(answer)
Hi, Yes you are correct, it is UV epoxy. The lamp is provide light
energy and it is not advise you to bake or roast the PCB, only provide
bright light, you also do it under sun light or just leave it for indoor
lighting for 24hours.
This is not A+B epoxy.... so no need other type accelerator....
No.. It can last for 1year. in provide you are not put it under strong
light. It is better to put it in the drawer, complete dark storage area.
Regards, Raymond
UV ink used in outdoors and plastics is not that thick, and is even more
expensive. I still believes this is epoxy, but just part A (bisphenol
resin) it's said can cure alone in UV. I might try it, and might even
buy this (but epoxy glue is cheaper).
> ∗I don't think anyone but in china would reccomend using gasoline to
> clean the board.
Anyone that paint iron, steel, wood etc use oil based things to clean
the brushes and so. Toluene, benzene, acetone etc are oil based.
Personally i have used much kerosene and nafta for cleaning brushes and
hands after painting. (BTW kerosene and cloth washing machine detergent
is a fantastic thing to wash paint, oil, grease etc from the hands).
For cleaning epoxy is acetone or even better acetic acid (vinegar),
acetone dilute epoxy in a way that can enter your blood stream, so use
gloves.
>