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| DIY tablet computer, maybe. |
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| PekkaNF:
Think that painting the glass is risky...I remember one design that needed something like that and design was between etching the glass or masking it, sandblasting and painting with epoxy. Is it possible to paint metal rim and all that hardware behind the glass black? Tape is pretty transparent and probably attaches better to painted metal than painted glass. The Tesa tape I use seems to be compatible with most of the paints, but reacted with one 2k alkyd paint (blistering). |
| S. Heslop:
I'm glad I asked because I didn't even consider the tape reacting with the paint. The hole in the plate was fairly crudely cut out, and I mesured the display wrong so there's a gap around the top and bottom too. I mean it's entirely concerns about how it looks so I could settle for this thing looking crude. I'm fairly sure it's going to anyways. I took a closer look at those arts and crafts paints and it turns out they're a type you bake on in an oven, and are advertised as dish washer safe. So that's probably plenty strong. But worth testing with the tape. |
| ddmckee54:
Depending on how "nasty" the solvents are that you are going to use with this, then your best option would probably be to sandblast the areas that are going to be painted to provide some tooth for the paint. Then using an epoxy paint should provide the best resistance to solvents. Personally, I think I'd just try cleaning the glass REALLY well, painting it with a good quality brand rattle can paint and assemble it, maybe baking the glass at a very low temperature for a while to be sure all the solvents are driven off before assembly. Worst case you've got to peel the tape off the steel plate before you try it again and maybe get some more glass. Don |
| nrml:
Instead of etching and painting the glass, why don't you get a vinyl sticker in the colour of your choice cut out on a plotter-cutter and stuck down. It would be cheaper, easier and probably tidier. It wouldn't need more than a good clean and degrease before sticking down. It wouldn't take you long to get a template drawn and emailed off to a sign-writer or similar on ebay. Vinyl stickers are used on plastics very widely. The probability of chemical damage occurring is far less than with paint. Here is the 3M VHB tape design guide. They have a lot of very useful data sheets and videos if you do a quick search. http://multimedia.3m.com/mws/media/441448O/vhb-tapes-design-guide.pdf Sorry for going on about it. I can't help feeling that it would be just the ticket for your project. Page 14 might be interesting to you. |
| PK:
--- Quote from: PekkaNF on July 25, 2018, 03:12:37 PM ---Think that painting the glass is risky...I remember one design that needed something like that and design was between etching the glass or masking it, sandblasting and painting with epoxy. --- End quote --- Agree We did a bunch of testing and what worked well for us was: Sandblast Paint immediately. Paint Paint Paint Cure for a long long time Glue with a non rigid, non shrinking, neutral cure silicone. (I suspect tape with a little bit of thickness and flexibility would work better). We've just (ie this batch) given the painting away and now bond a thin, opaque, layer onto the back to create the mask effect. It gets put in the squish-o-matic to force air bubbles out.. PK |
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