John F Posted July 19, 2016 Share Posted July 19, 2016 I bought the building jig and stuck the self adhesive sheet onto a piece of gloss varnished OSB to give the sheet a less dusty surface to stick to. Two days later this happened! The bubbles have no adhesive as they immediately spring back up. I am used to sticking down such materials after laminating maps with sticky backed plastic so I know I didn't stretch it or include bubbles. Any ideas what went on here and how to avoid it next time? Edited By John F on 19/07/2016 12:50:12 Edited By John F on 19/07/2016 12:55:39 Quote Link to comment Share on other sites More sharing options...
Piers Bowlan Posted July 19, 2016 Share Posted July 19, 2016 John, SLEC suggests using Conti board (it is covered in melamine and comes in convenient sized planks from B & Q etc.) The PVC self adhesive grid sticks like the proverbial to it! That is what I used at any rate and no problems so far.... You can buy another roll of stick on plastic grids from them here. Good luck. Quote Link to comment Share on other sites More sharing options...
Sparks Posted July 19, 2016 Share Posted July 19, 2016 I used Conti board and drew the gridlines on the board with a black marker pen, very therapeutic! Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted July 19, 2016 Share Posted July 19, 2016 Oh dear, that's a bit of a swine isn't it? I just used clean melamine coated chipboard for mine. A bit heavy but it works fine and no bubbles! BEB Quote Link to comment Share on other sites More sharing options...
Phil 9 Posted July 19, 2016 Share Posted July 19, 2016 I use on but I still build over the plan so I do not use the grid pattern Quote Link to comment Share on other sites More sharing options...
Pete B Posted July 19, 2016 Share Posted July 19, 2016 I used some melamine board with box-section steel runners below to ensure it never warps! When it came to attaching the grid, I sprayed the melamine with window cleaner, as per attaching vinyl decals and squeegee'd it out with a bundle of cloth as I progressed along the board. Pete Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted July 19, 2016 Share Posted July 19, 2016 The varnish used probably not fully cured and has reacted with the self adhesive .Go the melamine/ conti board route. Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted July 19, 2016 Share Posted July 19, 2016 Ignore the bubbles, they won't stop you using the jig. If you are really offended by the sight of them, stab them with a pin to let the air out then rub the vinyl back down. That should keep you occupied for an evening or two Quote Link to comment Share on other sites More sharing options...
John F Posted July 19, 2016 Author Share Posted July 19, 2016 The bubbles have lost their stick so I can press 'em down all day but it won't do anything. SLEC are sending a new sheet. I might just opt for melamine to avoid any possible contamination issues from the board. Quote Link to comment Share on other sites More sharing options...
Graham Bowers Posted July 19, 2016 Share Posted July 19, 2016 Definitely gas/ vapour from the substrate trapped under the film. In a past life I saw this under vinyl decals on non-metallic bodywork. The fix was to use porus vinyl for the decals to allow the gas / vapour to permeate through and escape. Graham Quote Link to comment Share on other sites More sharing options...
gangster Posted July 19, 2016 Share Posted July 19, 2016 I used contilas and it has been in use since 1985 no probs Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted July 19, 2016 Share Posted July 19, 2016 Conti board for me too.....no bubbles & impossible to peel off... Quote Link to comment Share on other sites More sharing options...
John F Posted July 19, 2016 Author Share Posted July 19, 2016 Conti board it is then! Thank you folks Quote Link to comment Share on other sites More sharing options...
Geoff S Posted July 19, 2016 Share Posted July 19, 2016 I stuck mine onto a sheet of MDF with 2x1 (50 mm x 25 mm ? ) strips underneath to stop warping. It 's been in use for about 20 years. I even used it last year to build a scale Thames sailing barge hull with great success - of course I sheeted it with 3mm balsa with a covering of glass fibre and epoxy. So it's almost an aeroplane Geoff Quote Link to comment Share on other sites More sharing options...
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