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Subject: Re: [Homebrew_PCBs] floor polish viscosity / maximum diluting?

From: Stefan Trethan <stefan_trethan@...>
Date: 2003-05-17

i forgot the following:

what do you think about the viscosity?
i know you can't see my polis but i assume it is same viscosity all over the world.

i believe it may pass through the inkjet undilutet but am not sure (will it correctly leave the nozzle).
the label says apply pure for first use, after then diluted 200ml in 10liters of water for cleaning. but
i think this applies only to floor cleaning and i can't find the right aplication instructions for
inkjet printing on the label ;-).


i did diluting experiments in the past when i tried colophonium as a resist (would be a nice flux too,
no cleaning). i dissolved it in ethanol and made a row of samples, each diluted more with further
ethanol. it can be diluted quite a while but after reaching a minimum amount it does no longer resist
correctly. it showed only protecting the edged of the line i made on the pcb. (the inner was dissolved,
so the colophonium was thicker on the edges).

i think one may make such a experient also with polish but i don't know how to simulate the right amount
/ film thickness applied by a inkjet.
i don't want to clean/ refill the cartridge with a lot of samples.

regards
stefan


17.05.2003 21:02:55, "Steve" <alienrelics@...> wrote:

>Food coloring: good. I'll try it, too.
>
>Pigmented inkjet inks are fine just so they'll go through an inkjet
>nozzle. Regular painting pigments are much larger grained.
>
>So far my old clogged Canon cartridge is not cleaning up. I may have
>to sacrifice one of the newer working ones.
>
>Steve
>
>--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
><stefan_trethan@g...> wrote:
>> food coloring:
>> in the initial posts here quite a while ago there is stated food
>coloring works.
>> i have none at home (see no reason for coloring the food...).
>> i maybe will get one if i find out where it is sold.
>>
>> to the pigmens:
>> i once used "pigmented ink" to refill the cartridge and it also worked.
>> (i assume they were small enough)
>>
>> regards
>> stefan
>>
>
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