Positive Photo Resist for etching

Model Railroader General Discussion (Model Railroader)
1

Has anyone here used Positive Photo Resist for etching?

I want to use a technique like this to make small decorative details, but I can’t find Positiv 20 in the US.

I did find PC197 from http://www.injectorall.com/photoresist.htm but it’s very expensive.

I also looked into toner transfer paper but that’s not cheap either and I don’t know if it works with ink jet printers.

Is there another liquid or spray that would work as shown in the YouTube video?

Thanks

2

Have you taken a look at Micro Mark etch kit?

https://www.micromark.com/hobby-supplies/plating-etching

Bernd

3

Yes. It’s $139 USD. It’s ridiculously expensive and with the technique in the video you don’t need the laminating machine.

4

Apparently you didn’t look further down the page. Isn’t this what you are looking for?

https://www.micromark.com/Pro-Etch-Inkjet-Film-8-1-2-Inches-x-11-Inches-Pkg-of-6_2

https://www.micromark.com/Photo-Resist-12-Inches-x-19-Inches-Pkg-of-2_2

Bernd

5

Thanks but that requires a laminating machine, which I do not have.

Might work just to put it under a sheet of glass rather than laminating. I guess it’s worth a try.

6

I just re-watched Luke Towan’s video for the Micro Mark stuff, and the video that I posted.

One big difference is that the Micro Mark method requires that you start with a negative image, so I would have to see how to convert my images to negative. The other process starts with a positive image, which is easier.

I also want to use the sodium hydroxide / ferric chloride method rather than the hydrochloric acid method because the chemicals are less noxious.

I’m going to have to look into this further. There may be a way to combine the two techniques. Thanks for the info.