Homebrew PCBs

Hi Stefan-

I was wondering about why your experiment failed. Some acrylic floor
floor polishes have a particle size of 185 nano meters. Some inkjet
print heads can handle particles of 750 nano meters diameter. So I
wonder what made the print heads clog? I guess that particle density
and ink viscosity might be related variables. 

Does anyone know an inkjet printhead engineer/ink chemist?

Grant

--- In Homebrew_PCBs@yahoogroups.com, stefan_trethan@g... wrote:
> hi to all..
> 
> this moment i finished my inkjet printing experiments.
> for all who aren't familiar with the topic:
> 
> the target was to use acrylic floor polish in a inkjet printer
cartridge and
> print it as a resist directly to the pcb surface.
> 
> i tried the hp400 and hp51626a cartridges.
> 
> i had several used of them, all were clogged a bit.
> in one i finally made a "access hole" to get the metal filter out and
> inspect the head, and apply solvent to it directly.
> i got it not to operate with all jets, some are still disfunctional.
> but it makes always a print with more than the half of them, making text
> good readable.
> 
> with time i really got sick about trying to clean them up further
(this is
> not easy).
> 
> so i decided it is time to put floor polish in the one working
partially.
> 
> i put polish in, colored with some ink, not a single drop of it ever got
> through the head.
> i put the cartridge in and from the beginning id was like glued clogged.
> 
> 
> believe me, all was right, (pressure, ink actually at the head).
> 
> it simply is not working and i don't want to experiment further.
> 
> 
> i'm wondering if anybody ever got this really to work and if yes i'm
> wondering which head he used, and which polish, and if undiluted or not.
>