Homebrew PCBs

> Russell Shaw wrote:
>
> 
> I think the gelatine coating only absorbs
> and quickly dries with dye ink.
> 
> The i865 has both pigment and dye ink black
> tanks, though the aftermarket cheap replacement
> for the pigment tank is usually a dye one too.
> The colour tanks are all dye.
> 
> When printing with text, the pigment tank is
> used. Pigment ink stays wet on the gelatine
> surface because the ink is oil/wax based to be
> waterproof. The gelatine only absorbs water,
> and dye inks are more "watery" based.
> 
> <SNIP URLS>
> 
> A pigment ink gets its colour from the colour
> of the suspended solids. They usually fade
> less in UV light.
> 
> A dye ink has no solids. The colour comes from
> the liquid. They usually break down and fade
> more in UV light (i can't say for certain about
> modern formulations though).

I think (but am not sure) that my phototool
printing is being done with the BC-3 (pigment)
cart.

The print was told to do "B&W only"

I will try do some tests making sure different
carts are used to see.

BTW - the ink DOES stay "wet" for a long time on
the gelatine surface.  However after the oven
treatment it does not "pool" when wet so makes
nice solid dark (temporarily wet) blacks.

I have read that yellow ink is sometimes more
UV blocking than black because of anti-fade
UV blockers used.  I have not tried this myself
yet.