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Subject: Re: [Homebrew_PCBs] DLP - getting better!

From: "Caslav Nedeljkovic" <caslav.nedeljkovic@...>
Date: 2011-08-23

Well, Mark, glad to hear that.

I've joined to this group mainly after reading your article about modifying E260. Frankly I had bad experiences with inkjet printers for regular (prepress) printouts (ink getting dry fast, nozzles clogging uneven ink quality in printouts, irregularity in ink depositing, sensitivity to liquid drops, etc so we used it only for correctional/draft copies never for prepress) that I didn't even consider modifications for PDB printing.

I'm developing my boards the "traditional" photo-litography way. Photo coating of regular boards and drying them in oven to become UV sensitive. I'm using PCB masks from imagesetter (I prepare them in DXP, then print them to PDF and email them to desing studio for printout on imagesettet, part that I'm trying to substitute here). Blacks there are real "thick" light unpassable black and resolution is excellent (at lest for my purposes, but... It requires time, waiting, going back and forth to get films... and it is reason I want to make complete circle at home). After UV exposure I use NaOH for developer (obtained from deluted bathroom sanitizer) and FeCl3 for etching.

Gives great results, but... Not fast and I'm dependant on external service for imagesetter part..

I'm still reading about the mods to get beter picture of work and costs involved, since your article on DLP caught my attention. So I'm looking forward to hearing news on your DLPexperience. Thumbs up :)

Best luck,
C.

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