Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Re: Increasing the opacity of laser printed film

From: Emil Johnsen <emil123@...>
Date: 2012-09-01

Thank you for your reply John.

I consider the problem to be (mostly) solved :)

The heat + powder method I described works very well. It adds 5 minutes to the process but the results are good.


Emil


On 31-08-12, John <jferrell13@...> wrote:
> One problem with the Laser discharge - electrostatic toner process is
>
> that the characteristics of the phototconducter do not assure a uniform
>
> density over large solid areas. I don't know the details so I will not
>
> speculate as to any remedies. Simply copying the image to an inkjet at a
>
> higher contrast level might serve your needs if you are not doing toner
>
> transfer. Also, it would seem to me that a 2x copy from a laser
>
> printer reduced to correct size on an inkjet might eliminate the voids.
>
>
>
> Of course that brings its own problems like wet ink wrinkles and
>
> tracking in the inkjet. After a while it may turn out that accepting
>
> the quality you have is not so bad!
>
>
>
> My experience is from many years of field service with IBM equipment. I
>
> learned long ago that I should pay attention to what a new operator had
>
> to say about today's problems. Frequently the newbie's fresh view led
>
> the way to a better process!
>
>
>
> Don't give up fixing the problem!